diff --git a/CHANGELOG.md b/CHANGELOG.md
index bba74ba..39309fe 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -5,12 +5,6 @@ All notable changes to pyCOREPOS 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).
 
-## v0.3.5 (2025-01-15)
-
-### Fix
-
-- add workaround to avoid missing schema columns
-
 ## v0.3.4 (2025-01-15)
 
 ### Fix
diff --git a/corepos/db/office_op/model.py b/corepos/db/office_op/model.py
index 4d79e88..6087f67 100644
--- a/corepos/db/office_op/model.py
+++ b/corepos/db/office_op/model.py
@@ -1039,11 +1039,12 @@ class MemberType(Base):
 
     ssi = sa.Column(sa.Boolean(), nullable=True)
 
-    # nb. this must be added explicitly if DB is new enough
-    #ignore_sales = sa.Column('ignoreSales', sa.Boolean(), nullable=True, default=False)
+    ignoreSales = sa.Column(sa.Boolean(), nullable=True, default=False)
+    ignore_sales = orm.synonym('ignoreSales')
 
-    # nb. this must be added explicitly if DB is new enough
-    #sales_code = sa.Column('salesCode', sa.Integer(), nullable=True)
+    # TODO: this was apparently added "recently" - isn't present in all DBs
+    # (need to figure out how to conditionally include it in model?)
+    # sales_code = sa.Column('salesCode', sa.Integer(), nullable=True)
 
     def __str__(self):
         return self.description or ""
@@ -1841,22 +1842,3 @@ class PurchaseOrderNote(Base):
 
     def __str__(self):
         return self.notes or ""
-
-
-# the rest of this is a workaround to deal with the fact that some
-# CORE databases have columns which others do not.  i had assumed that
-# all would be more or less the same but not so in practice.  so if
-# your DB *does* have these columns, you must invoke the function
-# below in order to merge them into your schema.  you should do this
-# on app startup and they'll be available normally from then on.
-
-RUNTIME = {'added_latest_columns': False}
-
-def use_latest_columns():
-    if RUNTIME['added_latest_columns']:
-        return
-
-    MemberType.ignore_sales = sa.Column('ignoreSales', sa.Boolean(), nullable=True, default=False)
-    MemberType.sales_code = sa.Column('salesCode', sa.Integer(), nullable=True)
-
-    RUNTIME['added_latest_columns'] = True
diff --git a/pyproject.toml b/pyproject.toml
index 2aaef92..143843f 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -6,7 +6,7 @@ build-backend = "hatchling.build"
 
 [project]
 name = "pyCOREPOS"
-version = "0.3.5"
+version = "0.3.4"
 description = "Python Interface to CORE POS"
 readme = "README.md"
 authors = [{name = "Lance Edgar", email = "lance@edbob.org"}]