diff --git a/CHANGELOG.md b/CHANGELOG.md
index 3af025c..e100544 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -5,13 +5,6 @@ All notable changes to WuttaSync will be documented in this file.
 The format is based on [Keep a Changelog](http://keepachangelog.com/en/1.0.0/)
 and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.html).
 
-## v0.6.0 (2026-03-17)
-
-### Feat
-
-- add concept of (non-)default importers for handler
-- add support for Wutta <-> Wutta import/export
-
 ## v0.5.1 (2026-02-13)
 
 ### Fix
diff --git a/docs/api/wuttasync.cli.export_wutta.rst b/docs/api/wuttasync.cli.export_wutta.rst
deleted file mode 100644
index cb3caf8..0000000
--- a/docs/api/wuttasync.cli.export_wutta.rst
+++ /dev/null
@@ -1,6 +0,0 @@
-
-``wuttasync.cli.export_wutta``
-==============================
-
-.. automodule:: wuttasync.cli.export_wutta
-   :members:
diff --git a/docs/api/wuttasync.cli.import_wutta.rst b/docs/api/wuttasync.cli.import_wutta.rst
deleted file mode 100644
index 466a726..0000000
--- a/docs/api/wuttasync.cli.import_wutta.rst
+++ /dev/null
@@ -1,6 +0,0 @@
-
-``wuttasync.cli.import_wutta``
-==============================
-
-.. automodule:: wuttasync.cli.import_wutta
-   :members:
diff --git a/docs/api/wuttasync.conf.rst b/docs/api/wuttasync.conf.rst
deleted file mode 100644
index 7533c9f..0000000
--- a/docs/api/wuttasync.conf.rst
+++ /dev/null
@@ -1,6 +0,0 @@
-
-``wuttasync.conf``
-==================
-
-.. automodule:: wuttasync.conf
-   :members:
diff --git a/docs/index.rst b/docs/index.rst
index 36d0e25..215e892 100644
--- a/docs/index.rst
+++ b/docs/index.rst
@@ -74,11 +74,8 @@ cf. :doc:`rattail-manual:data/sync/index`.
    api/wuttasync.cli
    api/wuttasync.cli.base
    api/wuttasync.cli.export_csv
-   api/wuttasync.cli.export_wutta
    api/wuttasync.cli.import_csv
    api/wuttasync.cli.import_versions
-   api/wuttasync.cli.import_wutta
-   api/wuttasync.conf
    api/wuttasync.emails
    api/wuttasync.exporting
    api/wuttasync.exporting.base
diff --git a/docs/narr/cli/builtin.rst b/docs/narr/cli/builtin.rst
index 399c2d7..5cb3123 100644
--- a/docs/narr/cli/builtin.rst
+++ b/docs/narr/cli/builtin.rst
@@ -27,18 +27,6 @@ Defined in: :mod:`wuttasync.cli.export_csv`
 .. program-output:: wutta export-csv --help
 
 
-.. _wutta-export-wutta:
-
-``wutta export-wutta``
-----------------------
-
-Export data to another Wutta :term:`app database`, from the local one.
-
-Defined in: :mod:`wuttasync.cli.export_wutta`
-
-.. program-output:: wutta export-wutta --help
-
-
 .. _wutta-import-csv:
 
 ``wutta import-csv``
@@ -76,15 +64,3 @@ in the :term:`app model`.
 Defined in: :mod:`wuttasync.cli.import_versions`
 
 .. program-output:: wutta import-versions --help
-
-
-.. _wutta-import-wutta:
-
-``wutta import-wutta``
-----------------------
-
-Import data from another Wutta :term:`app database`, to the local one.
-
-Defined in: :mod:`wuttasync.cli.import_wutta`
-
-.. program-output:: wutta import-wutta --help
diff --git a/pyproject.toml b/pyproject.toml
index 4e6e0a4..d3db422 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -6,7 +6,7 @@ build-backend = "hatchling.build"
 
 [project]
 name = "WuttaSync"
-version = "0.6.0"
+version = "0.5.1"
 description = "Wutta Framework for data import/export and real-time sync"
 readme = "README.md"
 authors = [{name = "Lance Edgar", email = "lance@wuttaproject.org"}]
@@ -30,7 +30,7 @@ dependencies = [
         "makefun",
         "rich",
         "SQLAlchemy-Utils",
-        "WuttJamaican[db]>=0.28.10",
+        "WuttJamaican[db]>=0.28.1",
 ]
 
 
@@ -42,15 +42,10 @@ tests = ["pylint", "pytest", "pytest-cov", "tox", "Wutta-Continuum>=0.3.0"]
 [project.entry-points."wutta.app.providers"]
 wuttasync = "wuttasync.app:WuttaSyncAppProvider"
 
-[project.entry-points."wutta.config.extensions"]
-"wuttasync" = "wuttasync.conf:WuttaSyncConfig"
-
 [project.entry-points."wuttasync.importing"]
 "export.to_csv.from_wutta" = "wuttasync.exporting.csv:FromWuttaToCsv"
-"export.to_wutta.from_wutta" = "wuttasync.importing.wutta:FromWuttaToWuttaExport"
 "import.to_versions.from_wutta" = "wuttasync.importing.versions:FromWuttaToVersions"
 "import.to_wutta.from_csv" = "wuttasync.importing.csv:FromCsvToWutta"
-"import.to_wutta.from_wutta" = "wuttasync.importing.wutta:FromWuttaToWuttaImport"
 
 [project.entry-points."wutta.typer_imports"]
 wuttasync = "wuttasync.cli"
diff --git a/src/wuttasync/app.py b/src/wuttasync/app.py
index a73b26e..0fa19fd 100644
--- a/src/wuttasync/app.py
+++ b/src/wuttasync/app.py
@@ -2,7 +2,7 @@
 ################################################################################
 #
 #  WuttaSync -- Wutta Framework for data import/export and real-time sync
-#  Copyright © 2024-2026 Lance Edgar
+#  Copyright © 2024-2025 Lance Edgar
 #
 #  This file is part of Wutta Framework.
 #
@@ -87,32 +87,18 @@ class WuttaSyncAppProvider(AppProvider):
 
         :returns: List of all import/export handler classes
         """
-        # first load all "registered" Handler classes.  note we must
-        # specify lists=True since handlers from different projects
-        # can be registered with the same key.
-        factory_lists = load_entry_points(
-            "wuttasync.importing", lists=True, ignore_errors=True
-        )
+        # first load all "registered" Handler classes
+        factories = load_entry_points("wuttasync.importing", ignore_errors=True)
 
         # organize registered classes by spec
-        specs = {}
-        all_factories = []
-        for factories in factory_lists.values():
-            for factory in factories:
-                specs[factory.get_spec()] = factory
-                all_factories.append(factory)
+        specs = {factory.get_spec(): factory for factory in factories.values()}
 
         # many handlers may not be registered per se, but may be
         # designated via config.  so try to include those too
-        seen = set()
-        for factory in all_factories:
-            key = factory.get_key()
-            if key in seen:
-                continue
-            spec = self.get_designated_import_handler_spec(key)
+        for factory in factories.values():
+            spec = self.get_designated_import_handler_spec(factory.get_key())
             if spec and spec not in specs:
                 specs[spec] = self.app.load_object(spec)
-            seen.add(key)
 
         # flatten back to simple list of classes
         factories = list(specs.values())
@@ -217,26 +203,22 @@ class WuttaSyncAppProvider(AppProvider):
         :param require: Set this to true if you want an error raised
            when no handler is found.
 
-        :param \\**kwargs: Remaining kwargs are passed as-is to the
-           handler constructor.
-
         :returns: The import/export handler instance.  If no handler
            is found, then ``None`` is returned, unless ``require``
            param is true, in which case error is raised.
         """
         # first try to fetch the handler per designated spec
-        spec = self.get_designated_import_handler_spec(key)
+        spec = self.get_designated_import_handler_spec(key, **kwargs)
         if spec:
             factory = self.app.load_object(spec)
-            return factory(self.config, **kwargs)
+            return factory(self.config)
 
         # nothing was designated, so leverage logic which already
         # sorts out which handler is "designated" for given key
         designated = self.get_designated_import_handlers()
         for handler in designated:
             if handler.get_key() == key:
-                factory = type(handler)
-                return factory(self.config, **kwargs)
+                return handler
 
         if require:
             raise ValueError(f"Cannot locate import handler for key: {key}")
diff --git a/src/wuttasync/cli/__init__.py b/src/wuttasync/cli/__init__.py
index 231f072..a3fa82b 100644
--- a/src/wuttasync/cli/__init__.py
+++ b/src/wuttasync/cli/__init__.py
@@ -40,7 +40,5 @@ from .base import (
 
 # nb. must bring in all modules for discovery to work
 from . import export_csv
-from . import export_wutta
 from . import import_csv
 from . import import_versions
-from . import import_wutta
diff --git a/src/wuttasync/cli/base.py b/src/wuttasync/cli/base.py
index 188555e..68bb536 100644
--- a/src/wuttasync/cli/base.py
+++ b/src/wuttasync/cli/base.py
@@ -65,13 +65,7 @@ class ImportCommandHandler(GenericHandler):
     :param key: Optional :term:`import/export key` to use for handler
        lookup.  Only used if ``import_handler`` param is not set.
 
-    :param \\**kwargs: Remaining kwargs are passed as-is to the
-       import/export handler constructor, i.e. when making the
-       :attr:`import_handler`.  Note that if the ``import_handler``
-       *instance* is specified, these kwargs will be ignored.
-
-    Typical usage for custom commands will be to provide the spec
-    (please note the *colon*)::
+    Typical usage for custom commands will be to provide the spec::
 
        handler = ImportCommandHandler(
            config, "poser.importing.foo:FromFooToPoser"
@@ -87,14 +81,6 @@ class ImportCommandHandler(GenericHandler):
     See also
     :meth:`~wuttasync.app.WuttaSyncAppProvider.get_import_handler()`
     which does the lookup by key.
-
-    Additional kwargs may be specified as needed.  Typically these
-    should wind up as attributes on the import/export handler
-    instance::
-
-       handler = ImportCommandHandler(
-           config, "poser.importing.foo:FromFooToPoser", dbkey="remote"
-       )
     """
 
     import_handler = None
@@ -103,22 +89,20 @@ class ImportCommandHandler(GenericHandler):
     invoked when command runs.  See also :meth:`run()`.
     """
 
-    def __init__(self, config, import_handler=None, key=None, **kwargs):
+    def __init__(self, config, import_handler=None, key=None):
         super().__init__(config)
 
         if import_handler:
             if isinstance(import_handler, ImportHandler):
                 self.import_handler = import_handler
             elif callable(import_handler):
-                self.import_handler = import_handler(self.config, **kwargs)
+                self.import_handler = import_handler(self.config)
             else:  # spec
                 factory = self.app.load_object(import_handler)
-                self.import_handler = factory(self.config, **kwargs)
+                self.import_handler = factory(self.config)
 
         elif key:
-            self.import_handler = self.app.get_import_handler(
-                key, require=True, **kwargs
-            )
+            self.import_handler = self.app.get_import_handler(key, require=True)
 
     def run(self, ctx, progress=None):  # pylint: disable=unused-argument
         """
@@ -177,7 +161,7 @@ class ImportCommandHandler(GenericHandler):
         # sort out which models to process
         models = kw.pop("models", None)
         if not models:
-            models = self.import_handler.get_default_importer_keys()
+            models = list(self.import_handler.importers)
         log.debug(
             "%s %s for models: %s",
             self.import_handler.actioning,
@@ -196,31 +180,13 @@ class ImportCommandHandler(GenericHandler):
 
         This is what happens when command line has ``--list-models``.
         """
-        all_keys = list(self.import_handler.importers)
-        default_keys = [k for k in all_keys if self.import_handler.is_default(k)]
-        extra_keys = [k for k in all_keys if k not in default_keys]
-
-        sys.stdout.write("\n")
+        sys.stdout.write("\nALL MODELS:\n")
         sys.stdout.write("==============================\n")
-        sys.stdout.write(" DEFAULT MODELS:\n")
+        for key in self.import_handler.importers:
+            sys.stdout.write(key)
+            sys.stdout.write("\n")
         sys.stdout.write("==============================\n")
-        if default_keys:
-            for key in default_keys:
-                sys.stdout.write(f"{key}\n")
-        else:
-            sys.stdout.write("(none)\n")
-
-        sys.stdout.write("==============================\n")
-        sys.stdout.write(" EXTRA MODELS:\n")
-        sys.stdout.write("==============================\n")
-        if extra_keys:
-            for key in extra_keys:
-                sys.stdout.write(f"{key}\n")
-        else:
-            sys.stdout.write("(none)\n")
-
-        sys.stdout.write("==============================\n")
-        sys.stdout.write(f" for {self.import_handler.get_title()}\n\n")
+        sys.stdout.write(f"for {self.import_handler.get_title()}\n\n")
 
 
 def import_command_template(  # pylint: disable=unused-argument,too-many-arguments,too-many-positional-arguments,too-many-locals
diff --git a/src/wuttasync/cli/export_wutta.py b/src/wuttasync/cli/export_wutta.py
deleted file mode 100644
index 2c89b3e..0000000
--- a/src/wuttasync/cli/export_wutta.py
+++ /dev/null
@@ -1,53 +0,0 @@
-# -*- coding: utf-8; -*-
-################################################################################
-#
-#  WuttaSync -- Wutta Framework for data import/export and real-time sync
-#  Copyright © 2024-2026 Lance Edgar
-#
-#  This file is part of Wutta Framework.
-#
-#  Wutta Framework is free software: you can redistribute it and/or modify it
-#  under the terms of the GNU General Public License as published by the Free
-#  Software Foundation, either version 3 of the License, or (at your option) any
-#  later version.
-#
-#  Wutta Framework is distributed in the hope that it will be useful, but
-#  WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
-#  FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
-#  more details.
-#
-#  You should have received a copy of the GNU General Public License along with
-#  Wutta Framework.  If not, see <http://www.gnu.org/licenses/>.
-#
-################################################################################
-"""
-See also: :ref:`wutta-export-wutta`
-"""
-
-from typing_extensions import Annotated
-
-import typer
-
-from wuttjamaican.cli import wutta_typer
-
-from .base import import_command, ImportCommandHandler
-
-
-@wutta_typer.command()
-@import_command
-def export_wutta(
-    ctx: typer.Context,
-    dbkey: Annotated[
-        str,
-        typer.Option(help="Config key for app db engine to be used as data target."),
-    ] = None,
-    **kwargs,
-):  # pylint: disable=unused-argument
-    """
-    Export data to another Wutta DB
-    """
-    config = ctx.parent.wutta_config
-    handler = ImportCommandHandler(
-        config, key="export.to_wutta.from_wutta", dbkey=ctx.params["dbkey"]
-    )
-    handler.run(ctx)
diff --git a/src/wuttasync/cli/import_wutta.py b/src/wuttasync/cli/import_wutta.py
deleted file mode 100644
index 02101e0..0000000
--- a/src/wuttasync/cli/import_wutta.py
+++ /dev/null
@@ -1,53 +0,0 @@
-# -*- coding: utf-8; -*-
-################################################################################
-#
-#  WuttaSync -- Wutta Framework for data import/export and real-time sync
-#  Copyright © 2024-2026 Lance Edgar
-#
-#  This file is part of Wutta Framework.
-#
-#  Wutta Framework is free software: you can redistribute it and/or modify it
-#  under the terms of the GNU General Public License as published by the Free
-#  Software Foundation, either version 3 of the License, or (at your option) any
-#  later version.
-#
-#  Wutta Framework is distributed in the hope that it will be useful, but
-#  WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
-#  FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
-#  more details.
-#
-#  You should have received a copy of the GNU General Public License along with
-#  Wutta Framework.  If not, see <http://www.gnu.org/licenses/>.
-#
-################################################################################
-"""
-See also: :ref:`wutta-import-wutta`
-"""
-
-from typing_extensions import Annotated
-
-import typer
-
-from wuttjamaican.cli import wutta_typer
-
-from .base import import_command, ImportCommandHandler
-
-
-@wutta_typer.command()
-@import_command
-def import_wutta(
-    ctx: typer.Context,
-    dbkey: Annotated[
-        str,
-        typer.Option(help="Config key for app db engine to be used as data source."),
-    ] = None,
-    **kwargs,
-):  # pylint: disable=unused-argument
-    """
-    Import data from another Wutta DB
-    """
-    config = ctx.parent.wutta_config
-    handler = ImportCommandHandler(
-        config, key="import.to_wutta.from_wutta", dbkey=ctx.params["dbkey"]
-    )
-    handler.run(ctx)
diff --git a/src/wuttasync/conf.py b/src/wuttasync/conf.py
deleted file mode 100644
index 3a980d5..0000000
--- a/src/wuttasync/conf.py
+++ /dev/null
@@ -1,50 +0,0 @@
-# -*- coding: utf-8; -*-
-################################################################################
-#
-#  WuttaSync -- Wutta Framework for data import/export and real-time sync
-#  Copyright © 2024-2026 Lance Edgar
-#
-#  This file is part of Wutta Framework.
-#
-#  Wutta Framework is free software: you can redistribute it and/or modify it
-#  under the terms of the GNU General Public License as published by the Free
-#  Software Foundation, either version 3 of the License, or (at your option) any
-#  later version.
-#
-#  Wutta Framework is distributed in the hope that it will be useful, but
-#  WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
-#  FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
-#  more details.
-#
-#  You should have received a copy of the GNU General Public License along with
-#  Wutta Framework.  If not, see <http://www.gnu.org/licenses/>.
-#
-################################################################################
-"""
-WuttaSync config extension
-"""
-
-from wuttjamaican.conf import WuttaConfigExtension
-
-
-class WuttaSyncConfig(WuttaConfigExtension):
-    """
-    Config extension for WuttaSync.
-
-    This just configures some default import/export handlers.
-    """
-
-    key = "wuttasync"
-
-    def configure(self, config):  # pylint: disable=empty-docstring
-        """ """
-
-        # default import/export handlers
-        config.setdefault(
-            "wuttasync.importing.import.to_wutta.from_wutta.default_handler",
-            "wuttasync.importing.wutta:FromWuttaToWuttaImport",
-        )
-        config.setdefault(
-            "wuttasync.importing.export.to_wutta.from_wutta.default_handler",
-            "wuttasync.importing.wutta:FromWuttaToWuttaExport",
-        )
diff --git a/src/wuttasync/emails.py b/src/wuttasync/emails.py
index 0c96f4f..b34112d 100644
--- a/src/wuttasync/emails.py
+++ b/src/wuttasync/emails.py
@@ -2,7 +2,7 @@
 ################################################################################
 #
 #  WuttaSync -- Wutta Framework for data import/export and real-time sync
-#  Copyright © 2024-2026 Lance Edgar
+#  Copyright © 2024-2025 Lance Edgar
 #
 #  This file is part of Wutta Framework.
 #
@@ -150,14 +150,6 @@ class ImportExportWarning(EmailSetting):
         }
 
 
-class export_to_wutta_from_wutta_warning(  # pylint: disable=invalid-name
-    ImportExportWarning
-):
-    """
-    Diff warning for Wutta → Wutta export.
-    """
-
-
 class import_to_versions_from_wutta_warning(  # pylint: disable=invalid-name
     ImportExportWarning
 ):
@@ -172,11 +164,3 @@ class import_to_wutta_from_csv_warning(  # pylint: disable=invalid-name
     """
     Diff warning for CSV → Wutta import.
     """
-
-
-class import_to_wutta_from_wutta_warning(  # pylint: disable=invalid-name
-    ImportExportWarning
-):
-    """
-    Diff warning for Wutta → Wutta import.
-    """
diff --git a/src/wuttasync/importing/csv.py b/src/wuttasync/importing/csv.py
index ca39830..60c51eb 100644
--- a/src/wuttasync/importing/csv.py
+++ b/src/wuttasync/importing/csv.py
@@ -239,7 +239,7 @@ class FromCsvToSqlalchemyHandlerMixin:
         raise NotImplementedError
 
     # TODO: pylint (correctly) flags this as duplicate code, matching
-    # on the wuttasync.importing.versions/wutta module - should fix?
+    # on the wuttasync.importing.versions module - should fix?
     def define_importers(self):
         """
         This mixin overrides typical (manual) importer definition, and
diff --git a/src/wuttasync/importing/handlers.py b/src/wuttasync/importing/handlers.py
index 2aa8ffe..cc53bdf 100644
--- a/src/wuttasync/importing/handlers.py
+++ b/src/wuttasync/importing/handlers.py
@@ -2,7 +2,7 @@
 ################################################################################
 #
 #  WuttaSync -- Wutta Framework for data import/export and real-time sync
-#  Copyright © 2024-2026 Lance Edgar
+#  Copyright © 2024-2025 Lance Edgar
 #
 #  This file is part of Wutta Framework.
 #
@@ -203,12 +203,7 @@ class ImportHandler(  # pylint: disable=too-many-public-methods,too-many-instanc
 
     def __init__(self, config, **kwargs):
         """ """
-        super().__init__(config)
-
-        # callers can set any attrs they want
-        for k, v in kwargs.items():
-            setattr(self, k, v)
-
+        super().__init__(config, **kwargs)
         self.importers = self.define_importers()
 
     def __str__(self):
@@ -371,7 +366,7 @@ class ImportHandler(  # pylint: disable=too-many-public-methods,too-many-instanc
         changes = OrderedDict()
 
         if not keys:
-            keys = self.get_default_importer_keys()
+            keys = list(self.importers)
 
         success = False
         try:
@@ -655,36 +650,6 @@ class ImportHandler(  # pylint: disable=too-many-public-methods,too-many-instanc
         """
         return kwargs
 
-    def is_default(self, key):
-        """
-        Return a boolean indicating whether the importer corresponding
-        to ``key`` should be considered "default" - i.e. included as
-        part of a typical "import all" job.
-
-        The default logic here returns ``True`` in all cases; subclass can
-        override as needed.
-
-        :param key: Key indicating the importer.
-
-        :rtype: bool
-        """
-        return True
-
-    def get_default_importer_keys(self):
-        """
-        Return the list of importer keys which should be considered
-        "default" - i.e. which should be included as part of a typical
-        "import all" job.
-
-        This inspects :attr:`importers` and calls :meth:`is_default()`
-        for each, to determine the result.
-
-        :returns: List of importer keys (strings).
-        """
-        keys = list(self.importers)
-        keys = [k for k in keys if self.is_default(k)]
-        return keys
-
     def process_changes(self, changes):
         """
         Run post-processing operations on the given changes, if
diff --git a/src/wuttasync/importing/versions.py b/src/wuttasync/importing/versions.py
index 07a03a3..d558c36 100644
--- a/src/wuttasync/importing/versions.py
+++ b/src/wuttasync/importing/versions.py
@@ -138,7 +138,7 @@ class FromWuttaToVersions(FromWuttaHandler, ToWuttaHandler):
         return kwargs
 
     # TODO: pylint (correctly) flags this as duplicate code, matching
-    # on the wuttasync.importing.csv/wutta module - should fix?
+    # on the wuttasync.importing.csv module - should fix?
     def define_importers(self):
         """
         This overrides typical (manual) importer definition, instead
diff --git a/src/wuttasync/importing/wutta.py b/src/wuttasync/importing/wutta.py
index 10e6e6c..882f7df 100644
--- a/src/wuttasync/importing/wutta.py
+++ b/src/wuttasync/importing/wutta.py
@@ -2,7 +2,7 @@
 ################################################################################
 #
 #  WuttaSync -- Wutta Framework for data import/export and real-time sync
-#  Copyright © 2024-2026 Lance Edgar
+#  Copyright © 2024-2025 Lance Edgar
 #
 #  This file is part of Wutta Framework.
 #
@@ -24,172 +24,10 @@
 Wutta → Wutta import/export
 """
 
-from collections import OrderedDict
-
-from sqlalchemy_utils.functions import get_primary_keys
-
-from wuttjamaican.db.util import make_topo_sortkey
-
 from .base import FromSqlalchemyMirror
-from .model import ToWutta
-from .handlers import FromWuttaHandler, ToWuttaHandler, Orientation
 
 
 class FromWuttaMirror(FromSqlalchemyMirror):  # pylint: disable=abstract-method
     """
-    Base class for Wutta → Wutta data :term:`importers/exporters
-    <importer>`.
-
-    This inherits from
-    :class:`~wuttasync.importing.base.FromSqlalchemyMirror`.
+    Base class for Wutta -> Wutta data importers.
     """
-
-
-class FromWuttaToWuttaBase(FromWuttaHandler, ToWuttaHandler):
-    """
-    Base class for Wutta → Wutta data :term:`import/export handlers
-    <import handler>`.
-
-    This inherits from
-    :class:`~wuttasync.importing.handlers.FromWuttaHandler` and
-    :class:`~wuttasync.importing.handlers.ToWuttaHandler`.
-    """
-
-    dbkey = None
-    """
-    Config key for the "other" (non-local) :term:`app database`.
-    Depending on context this will represent either the source or
-    target for import/export.
-    """
-
-    def get_target_model(self):  # pylint: disable=missing-function-docstring
-        return self.app.model
-
-    # TODO: pylint (correctly) flags this as duplicate code, matching
-    # on the wuttasync.importing.csv/versions module - should fix?
-    def define_importers(self):
-        """
-        This overrides typical (manual) importer definition, and
-        instead dynamically generates a set of importers, e.g. one per
-        table in the target DB.
-
-        It does this by calling :meth:`make_importer_factory()` for
-        each class found in the :term:`app model`.
-        """
-        importers = {}
-        model = self.get_target_model()
-
-        # pylint: disable=duplicate-code
-        # mostly try to make an importer for every data model
-        for name in dir(model):
-            cls = getattr(model, name)
-            if (
-                isinstance(cls, type)
-                and issubclass(cls, model.Base)
-                and cls is not model.Base
-            ):
-                importers[name] = self.make_importer_factory(cls, name)
-
-        # sort importers according to schema topography
-        topo_sortkey = make_topo_sortkey(model)
-        importers = OrderedDict(
-            [(name, importers[name]) for name in sorted(importers, key=topo_sortkey)]
-        )
-
-        return importers
-
-    def make_importer_factory(self, model_class, name):
-        """
-        Generate and return a new :term:`importer` class, targeting
-        the given :term:`data model` class.
-
-        The newly-created class will inherit from:
-
-        * :class:`FromWuttaMirror`
-        * :class:`~wuttasync.importing.model.ToWutta`
-
-        :param model_class: A data model class.
-
-        :param name: The "model name" for the importer/exporter.  New
-           class name will be based on this, so e.g. ``Widget`` model
-           name becomes ``WidgetImporter`` class name.
-
-        :returns: The new class, meant to process import/export
-           targeting the given data model.
-        """
-        return type(
-            f"{name}Importer",
-            (FromWuttaMirror, ToWutta),
-            {
-                "model_class": model_class,
-                "key": list(get_primary_keys(model_class)),
-            },
-        )
-
-    def is_default(self, key):
-        """ """
-        special = [
-            "Setting",
-            "Role",
-            "Permission",
-            "User",
-            "UserRole",
-            "UserAPIToken",
-            "Upgrade",
-        ]
-        if key in special:
-            return False
-
-        return True
-
-
-class FromWuttaToWuttaImport(FromWuttaToWuttaBase):
-    """
-    Handler for Wutta (other) → Wutta (local) data import.
-
-    This inherits from :class:`FromWuttaToWuttaBase`.
-    """
-
-    orientation = Orientation.IMPORT
-    """ """  # nb. suppress docs
-
-    def make_source_session(self):
-        """
-        This makes a "normal" :term:`db session`, but will use the
-        engine corresponding to the
-        :attr:`~FromWuttaToWuttaBase.dbkey`.
-        """
-        if (
-            not self.dbkey
-            or self.dbkey == "default"
-            or self.dbkey not in self.config.appdb_engines
-        ):
-            raise ValueError(f"dbkey is not valid: {self.dbkey}")
-        engine = self.config.appdb_engines[self.dbkey]
-        return self.app.make_session(bind=engine)
-
-
-class FromWuttaToWuttaExport(FromWuttaToWuttaBase):
-    """
-    Handler for Wutta (local) → Wutta (other) data export.
-
-    This inherits from :class:`FromWuttaToWuttaBase`.
-    """
-
-    orientation = Orientation.EXPORT
-    """ """  # nb. suppress docs
-
-    def make_target_session(self):
-        """
-        This makes a "normal" :term:`db session`, but will use the
-        engine corresponding to the
-        :attr:`~FromWuttaToWuttaBase.dbkey`.
-        """
-        if (
-            not self.dbkey
-            or self.dbkey == "default"
-            or self.dbkey not in self.config.appdb_engines
-        ):
-            raise ValueError(f"dbkey is not valid: {self.dbkey}")
-        engine = self.config.appdb_engines[self.dbkey]
-        return self.app.make_session(bind=engine)
diff --git a/tests/cli/test_base.py b/tests/cli/test_base.py
index d2b98e6..209dbca 100644
--- a/tests/cli/test_base.py
+++ b/tests/cli/test_base.py
@@ -3,7 +3,7 @@
 import inspect
 import sys
 from unittest import TestCase
-from unittest.mock import patch, Mock, call
+from unittest.mock import patch, Mock
 
 from wuttasync.cli import base as mod
 from wuttjamaican.testing import DataTestCase
@@ -25,55 +25,19 @@ class TestImportCommandHandler(DataTestCase):
         # as spec
         handler = self.make_handler(import_handler=FromCsvToWutta.get_spec())
         self.assertIsInstance(handler.import_handler, FromCsvToWutta)
-        self.assertFalse(hasattr(handler, "foo"))
-        self.assertFalse(hasattr(handler.import_handler, "foo"))
-
-        # as spec, w/ kwargs
-        handler = self.make_handler(import_handler=FromCsvToWutta.get_spec(), foo="bar")
-        self.assertIsInstance(handler.import_handler, FromCsvToWutta)
-        self.assertFalse(hasattr(handler, "foo"))
-        self.assertTrue(hasattr(handler.import_handler, "foo"))
-        self.assertEqual(handler.import_handler.foo, "bar")
 
         # as factory
         handler = self.make_handler(import_handler=FromCsvToWutta)
         self.assertIsInstance(handler.import_handler, FromCsvToWutta)
-        self.assertFalse(hasattr(handler, "foo"))
-        self.assertFalse(hasattr(handler.import_handler, "foo"))
-
-        # as factory, w/ kwargs
-        handler = self.make_handler(import_handler=FromCsvToWutta, foo="bar")
-        self.assertIsInstance(handler.import_handler, FromCsvToWutta)
-        self.assertFalse(hasattr(handler, "foo"))
-        self.assertTrue(hasattr(handler.import_handler, "foo"))
-        self.assertEqual(handler.import_handler.foo, "bar")
 
         # as instance
         myhandler = FromCsvToWutta(self.config)
         handler = self.make_handler(import_handler=myhandler)
         self.assertIs(handler.import_handler, myhandler)
-        self.assertFalse(hasattr(handler, "foo"))
-        self.assertFalse(hasattr(handler.import_handler, "foo"))
-
-        # as instance, w/ kwargs (which are ignored)
-        myhandler = FromCsvToWutta(self.config)
-        handler = self.make_handler(import_handler=myhandler, foo="bar")
-        self.assertIs(handler.import_handler, myhandler)
-        self.assertFalse(hasattr(handler, "foo"))
-        self.assertFalse(hasattr(handler.import_handler, "foo"))
 
         # as key
         handler = self.make_handler(key="import.to_wutta.from_csv")
         self.assertIsInstance(handler.import_handler, FromCsvToWutta)
-        self.assertFalse(hasattr(handler, "foo"))
-        self.assertFalse(hasattr(handler.import_handler, "foo"))
-
-        # as key, w/ kwargs
-        handler = self.make_handler(key="import.to_wutta.from_csv", foo="bar")
-        self.assertIsInstance(handler.import_handler, FromCsvToWutta)
-        self.assertFalse(hasattr(handler, "foo"))
-        self.assertTrue(hasattr(handler.import_handler, "foo"))
-        self.assertEqual(handler.import_handler.foo, "bar")
 
     def test_run(self):
         handler = self.make_handler(
@@ -169,60 +133,22 @@ class TestImportCommandHandler(DataTestCase):
                     params={},
                 ),
             )
+            # self.assertRaises(FileNotFoundError, handler.run, ctx)
             handler.run(ctx)
             exit_.assert_not_called()
 
     def test_list_models(self):
-
-        # CSV -> Wutta (all importers are default)
         handler = self.make_handler(
             import_handler="wuttasync.importing.csv:FromCsvToWutta"
         )
+
         with patch.object(mod, "sys") as sys:
             handler.list_models({})
-            sys.stdout.write.assert_has_calls(
-                [
-                    call("==============================\n"),
-                    call(" EXTRA MODELS:\n"),
-                    call("==============================\n"),
-                    call("(none)\n"),
-                    call("==============================\n"),
-                ]
-            )
-
-        # Wutta -> Wutta (only Person importer is default)
-        handler = self.make_handler(
-            import_handler="wuttasync.importing.wutta:FromWuttaToWuttaImport"
-        )
-        with patch.object(mod, "sys") as sys:
-            handler.list_models({})
-            sys.stdout.write.assert_has_calls(
-                [
-                    call("==============================\n"),
-                    call(" DEFAULT MODELS:\n"),
-                    call("==============================\n"),
-                    call("Person\n"),
-                    call("==============================\n"),
-                    call(" EXTRA MODELS:\n"),
-                    call("==============================\n"),
-                ]
-            )
-
-        # again, but pretend there are no default importers
-        with patch.object(handler.import_handler, "is_default", return_value=False):
-            with patch.object(mod, "sys") as sys:
-                handler.list_models({})
-                sys.stdout.write.assert_has_calls(
-                    [
-                        call("==============================\n"),
-                        call(" DEFAULT MODELS:\n"),
-                        call("==============================\n"),
-                        call("(none)\n"),
-                        call("==============================\n"),
-                        call(" EXTRA MODELS:\n"),
-                        call("==============================\n"),
-                    ]
-                )
+            # just test a few random things we expect to see
+            self.assertTrue(sys.stdout.write.has_call("ALL MODELS:\n"))
+            self.assertTrue(sys.stdout.write.has_call("Person"))
+            self.assertTrue(sys.stdout.write.has_call("User"))
+            self.assertTrue(sys.stdout.write.has_call("Upgrade"))
 
 
 class TestImporterCommand(TestCase):
diff --git a/tests/cli/test_export_wutta.py b/tests/cli/test_export_wutta.py
deleted file mode 100644
index 73e4ab2..0000000
--- a/tests/cli/test_export_wutta.py
+++ /dev/null
@@ -1,23 +0,0 @@
-# -*- coding: utf-8; -*-
-
-from unittest import TestCase
-from unittest.mock import MagicMock, patch
-
-from wuttasync.cli import export_wutta as mod, ImportCommandHandler
-
-
-class TestExportWutta(TestCase):
-
-    def test_basic(self):
-        params = {
-            "dbkey": "another",
-            "models": [],
-            "create": True,
-            "update": True,
-            "delete": False,
-            "dry_run": True,
-        }
-        ctx = MagicMock(params=params)
-        with patch.object(ImportCommandHandler, "run") as run:
-            mod.export_wutta(ctx)
-            run.assert_called_once_with(ctx)
diff --git a/tests/cli/test_import_wutta.py b/tests/cli/test_import_wutta.py
deleted file mode 100644
index 3887c56..0000000
--- a/tests/cli/test_import_wutta.py
+++ /dev/null
@@ -1,23 +0,0 @@
-# -*- coding: utf-8; -*-
-
-from unittest import TestCase
-from unittest.mock import MagicMock, patch
-
-from wuttasync.cli import import_wutta as mod, ImportCommandHandler
-
-
-class TestImportWutta(TestCase):
-
-    def test_basic(self):
-        params = {
-            "dbkey": "another",
-            "models": [],
-            "create": True,
-            "update": True,
-            "delete": False,
-            "dry_run": True,
-        }
-        ctx = MagicMock(params=params)
-        with patch.object(ImportCommandHandler, "run") as run:
-            mod.import_wutta(ctx)
-            run.assert_called_once_with(ctx)
diff --git a/tests/importing/test_handlers.py b/tests/importing/test_handlers.py
index ad8a9a3..659cda1 100644
--- a/tests/importing/test_handlers.py
+++ b/tests/importing/test_handlers.py
@@ -7,7 +7,6 @@ from uuid import UUID
 from wuttjamaican.testing import DataTestCase
 
 from wuttasync.importing import handlers as mod, Importer, ToSqlalchemy
-from wuttasync.importing.wutta import FromWuttaToWuttaImport
 
 
 class FromFooToBar(mod.ImportHandler):
@@ -20,17 +19,6 @@ class TestImportHandler(DataTestCase):
     def make_handler(self, **kwargs):
         return mod.ImportHandler(self.config, **kwargs)
 
-    def test_constructor(self):
-
-        # attr missing by default
-        handler = self.make_handler()
-        self.assertFalse(hasattr(handler, "some_foo_attr"))
-
-        # but constructor can set it
-        handler = self.make_handler(some_foo_attr="bar")
-        self.assertTrue(hasattr(handler, "some_foo_attr"))
-        self.assertEqual(handler.some_foo_attr, "bar")
-
     def test_str(self):
         handler = self.make_handler()
         self.assertEqual(str(handler), "None → None")
@@ -254,25 +242,6 @@ class TestImportHandler(DataTestCase):
             KeyError, handler.get_importer, "BunchOfNonsense", model_class=model.Setting
         )
 
-    def test_is_default(self):
-        handler = self.make_handler()
-        # nb. anything is considered default, by default
-        self.assertTrue(handler.is_default("there_is_no_way_this_is_valid"))
-
-    def test_get_default_importer_keys(self):
-
-        # use handler which already has some non/default keys
-        handler = FromWuttaToWuttaImport(self.config)
-
-        # it supports many importers
-        self.assertIn("Person", handler.importers)
-        self.assertIn("User", handler.importers)
-        self.assertIn("Setting", handler.importers)
-
-        # but only Person is default
-        keys = handler.get_default_importer_keys()
-        self.assertEqual(keys, ["Person"])
-
     def test_get_warnings_email_key(self):
         handler = FromFooToBar(self.config)
 
diff --git a/tests/importing/test_wutta.py b/tests/importing/test_wutta.py
index cd43df0..1533605 100644
--- a/tests/importing/test_wutta.py
+++ b/tests/importing/test_wutta.py
@@ -1,134 +1,3 @@
 # -*- coding: utf-8; -*-
 
-from unittest.mock import patch
-
-import sqlalchemy as sa
-
-from wuttjamaican.testing import DataTestCase
-
 from wuttasync.importing import wutta as mod
-from wuttasync.importing import ToWutta
-
-
-class TestFromWuttaMirror(DataTestCase):
-
-    def make_importer(self, **kwargs):
-        return mod.FromWuttaMirror(self.config, **kwargs)
-
-    def test_basic(self):
-        importer = self.make_importer()
-        self.assertIsInstance(importer, mod.FromWuttaMirror)
-
-
-class TestFromWuttaToWuttaBase(DataTestCase):
-
-    def make_handler(self, **kwargs):
-        return mod.FromWuttaToWuttaBase(self.config, **kwargs)
-
-    def test_dbkey(self):
-
-        # null by default
-        handler = self.make_handler()
-        self.assertIsNone(handler.dbkey)
-
-        # but caller can specify
-        handler = self.make_handler(dbkey="another")
-        self.assertEqual(handler.dbkey, "another")
-
-    def test_make_importer_factory(self):
-        model = self.app.model
-        handler = self.make_handler()
-
-        # returns a typical importer
-        factory = handler.make_importer_factory(model.User, "User")
-        self.assertTrue(issubclass(factory, mod.FromWuttaMirror))
-        self.assertTrue(issubclass(factory, ToWutta))
-        self.assertIs(factory.model_class, model.User)
-        self.assertEqual(factory.__name__, "UserImporter")
-
-    def test_define_importers(self):
-        handler = self.make_handler()
-
-        # all models are included
-        importers = handler.define_importers()
-        self.assertIn("Setting", importers)
-        self.assertIn("Person", importers)
-        self.assertIn("Role", importers)
-        self.assertIn("Permission", importers)
-        self.assertIn("User", importers)
-        self.assertIn("UserRole", importers)
-        self.assertIn("UserAPIToken", importers)
-        self.assertIn("Upgrade", importers)
-        self.assertNotIn("BatchMixin", importers)
-        self.assertNotIn("BatchRowMixin", importers)
-        self.assertNotIn("Base", importers)
-
-        # also, dependencies are implied by sort order
-        models = list(importers)
-        self.assertLess(models.index("Person"), models.index("User"))
-        self.assertLess(models.index("User"), models.index("UserRole"))
-        self.assertLess(models.index("User"), models.index("Upgrade"))
-
-
-class TestFromWuttaToWuttaImport(DataTestCase):
-
-    def make_handler(self, **kwargs):
-        return mod.FromWuttaToWuttaImport(self.config, **kwargs)
-
-    def test_make_source_session(self):
-
-        # error if null dbkey
-        handler = self.make_handler()
-        self.assertIsNone(handler.dbkey)
-        self.assertRaises(ValueError, handler.make_source_session)
-
-        # error if dbkey not found
-        handler = self.make_handler(dbkey="another")
-        self.assertEqual(handler.dbkey, "another")
-        self.assertNotIn("another", self.config.appdb_engines)
-        self.assertRaises(ValueError, handler.make_source_session)
-
-        # error if dbkey is 'default'
-        handler = self.make_handler(dbkey="default")
-        self.assertEqual(handler.dbkey, "default")
-        self.assertIn("default", self.config.appdb_engines)
-        self.assertRaises(ValueError, handler.make_source_session)
-
-        # expected behavior
-        another_engine = sa.create_engine("sqlite://")
-        handler = self.make_handler(dbkey="another")
-        with patch.dict(self.config.appdb_engines, {"another": another_engine}):
-            session = handler.make_source_session()
-            self.assertIs(session.bind, another_engine)
-
-
-class TestFromWuttaToWuttaExport(DataTestCase):
-
-    def make_handler(self, **kwargs):
-        return mod.FromWuttaToWuttaExport(self.config, **kwargs)
-
-    def test_make_target_session(self):
-
-        # error if null dbkey
-        handler = self.make_handler()
-        self.assertIsNone(handler.dbkey)
-        self.assertRaises(ValueError, handler.make_target_session)
-
-        # error if dbkey not found
-        handler = self.make_handler(dbkey="another")
-        self.assertEqual(handler.dbkey, "another")
-        self.assertNotIn("another", self.config.appdb_engines)
-        self.assertRaises(ValueError, handler.make_target_session)
-
-        # error if dbkey is 'default'
-        handler = self.make_handler(dbkey="default")
-        self.assertEqual(handler.dbkey, "default")
-        self.assertIn("default", self.config.appdb_engines)
-        self.assertRaises(ValueError, handler.make_target_session)
-
-        # expected behavior
-        another_engine = sa.create_engine("sqlite://")
-        handler = self.make_handler(dbkey="another")
-        with patch.dict(self.config.appdb_engines, {"another": another_engine}):
-            session = handler.make_target_session()
-            self.assertIs(session.bind, another_engine)
diff --git a/tests/test_app.py b/tests/test_app.py
index 23eb4bd..560d89d 100644
--- a/tests/test_app.py
+++ b/tests/test_app.py
@@ -46,18 +46,6 @@ class TestWuttaSyncAppProvider(ConfigTestCase):
         self.assertIn(FromCsvToWutta, handlers)
         self.assertIn(FromFooToBar, handlers)
 
-        # now for something completely different..here we pretend there
-        # are multiple handler entry points with same key.  all should
-        # be returned, including both which share the key.
-        entry_points = {
-            "import.to_baz.from_foo": [FromFooToBaz1, FromFooToBaz2],
-        }
-        with patch.object(mod, "load_entry_points", return_value=entry_points):
-            handlers = self.app.get_all_import_handlers()
-            self.assertEqual(len(handlers), 2)
-            self.assertIn(FromFooToBaz1, handlers)
-            self.assertIn(FromFooToBaz2, handlers)
-
     def test_get_designated_import_handler_spec(self):
 
         # fetch of unknown key returns none
@@ -151,14 +139,6 @@ class TestWuttaSyncAppProvider(ConfigTestCase):
         handler = self.app.get_import_handler("import.to_wutta.from_csv")
         self.assertIsInstance(handler, FromCsvToWutta)
         self.assertIsInstance(handler, FromCsvToPoser)
-        self.assertFalse(hasattr(handler, "foo_attr"))
-
-        # can pass extra kwargs
-        handler = self.app.get_import_handler(
-            "import.to_wutta.from_csv", foo_attr="whatever"
-        )
-        self.assertTrue(hasattr(handler, "foo_attr"))
-        self.assertEqual(handler.foo_attr, "whatever")
 
         # unknown importer cannot be found
         handler = self.app.get_import_handler("bogus")
diff --git a/tests/test_conf.py b/tests/test_conf.py
deleted file mode 100644
index eefa5b7..0000000
--- a/tests/test_conf.py
+++ /dev/null
@@ -1,39 +0,0 @@
-# -*- coding: utf-8; -*-
-
-from wuttjamaican.testing import ConfigTestCase
-
-from wuttasync import conf as mod
-
-
-class TestWuttaSyncConfig(ConfigTestCase):
-
-    def make_extension(self):
-        return mod.WuttaSyncConfig()
-
-    def test_default_import_handlers(self):
-
-        # base config has no default handlers
-        spec = self.config.get(
-            "wuttasync.importing.import.to_wutta.from_wutta.default_handler"
-        )
-        self.assertIsNone(spec)
-        spec = self.config.get(
-            "wuttasync.importing.export.to_wutta.from_wutta.default_handler"
-        )
-        self.assertIsNone(spec)
-
-        # extend config
-        ext = self.make_extension()
-        ext.configure(self.config)
-
-        # config now has default handlers
-        spec = self.config.get(
-            "wuttasync.importing.import.to_wutta.from_wutta.default_handler"
-        )
-        self.assertIsNotNone(spec)
-        self.assertEqual(spec, "wuttasync.importing.wutta:FromWuttaToWuttaImport")
-        spec = self.config.get(
-            "wuttasync.importing.export.to_wutta.from_wutta.default_handler"
-        )
-        self.assertIsNotNone(spec)
-        self.assertEqual(spec, "wuttasync.importing.wutta:FromWuttaToWuttaExport")
diff --git a/tests/test_emails.py b/tests/test_emails.py
index bdaebed..9494753 100644
--- a/tests/test_emails.py
+++ b/tests/test_emails.py
@@ -5,7 +5,6 @@ from wuttjamaican.testing import ConfigTestCase
 from wuttasync import emails as mod
 from wuttasync.importing import ImportHandler
 from wuttasync.testing import ImportExportWarningTestCase
-from wuttasync.conf import WuttaSyncConfig
 
 
 class FromFooToWutta(ImportHandler):
@@ -75,24 +74,8 @@ class TestImportExportWarning(ConfigTestCase):
 
 class TestEmailSettings(ImportExportWarningTestCase):
 
-    def make_config(self, files=None, **kwargs):
-        config = super().make_config(files, **kwargs)
-
-        # need this to ensure default import/export handlers.  since
-        # behavior can vary depending on what packages are installed.
-        ext = WuttaSyncConfig()
-        ext.configure(config)
-
-        return config
-
-    def test_export_to_wutta_from_wutta_warning(self):
-        self.do_test_preview("export_to_wutta_from_wutta_warning")
-
     def test_import_to_versions_from_wutta_warning(self):
         self.do_test_preview("import_to_versions_from_wutta_warning")
 
     def test_import_to_wutta_from_csv_warning(self):
         self.do_test_preview("import_to_wutta_from_csv_warning")
-
-    def test_import_to_wutta_from_wutta_warning(self):
-        self.do_test_preview("import_to_wutta_from_wutta_warning")