What changed: I liked gexgecko's insert and wanted to be able to use it with my sleeved cards. So, I rebuilt the solid model from the stl and expanded the width of the card section by 1.5mm to accommodate. However, with Reformation the added cards and resulting sleeved card height makes this less tenable to fit. The length of my card sleeves also makes them too long without removing the top wall completely.
For more closely sleeved cards in length this appears like it will work for just the base game (no reformation expansion).
May revisit this in the future.