I got a little more done this weekend. I got my test platform created:

You can see here that I ran out of corner pieces. It’s not quite as stable as I’d like, but it’ll do. I also make a trip to Home Depot looking for hardware to be able to make some prototypes. I didn’t find exactly what I wanted, but left with a few potential options. I’ll also take a look at making my own 3D modeled part for testing.