Hey William,
I find it interesting that you build a table that combines two properties of a table that both showed to be desirable among forum members: The flippable table design for saving space when not in use and the vertical workpiece mounting option for making dovetail and other joints for cases and drawers parts.
The only other combination of both that I remember was this one.
In your first picture above it is obvious you could have made the opening in the table much deeper until workpieces are limited by the transversal brace of the rolling base:
What are the dimensions of your opening actually? Are you able to make all drawers sides or did you already have the case where your opening was not wide enough?