I'm in a bit of a holding pattern while waiting for my AC unit to arrive so I've been working on some other fronts.
Specifically, working on the under-table mounts that I'm making to make implementing
@skytop35 's slide switch solution. These make it easy to mount everything with screws AND importantly, give me the ability to make minor adjustments (a trick I loved on
@rodsup9000 's awesome Tortoise mounts).
The original concept.

To reality.


And now to refinements.

You can see my original print left the screw holes way too large (hence my ghetto a$$ washers) and was larger than really necessary. I also need to get some of the Dude Bro hardware to test fit it and see what I need to do to accommodate it.
I'm also thinking about the benchwork for the rest of the layout. I'm going to be making L girders to hang off of the brackets for the wall section. These will support risers (I'm thinking 1x2 or 1x3) and then some sort of roadbed. I'm not sure what to do in that regard, and am open to suggestions.
Cookie cutter is a possibility, but it seems awfully wasteful of suddenly expensive plywood.
I like the idea of splines, but don't have a table saw to rip down the thin strips to make them. For that reason, I was thinking of maybe trying PVC trim strips. Any thoughts?
The other thing I am looking for some feedback on is how to stabilize it all on the carpet. In the past I've used NTRAK style leg leveling bolts (which have worked ok), but I'm curious if anyone's done anything they liked better.