Darryl, I love it. The writeup is great -- even as a work in progress -- and the plexiglass slide, shots of your early scanner, and "things that didn't work" section are valuable. The simplicity of your current camera mount system is something that would help people get started, I think.
One thing -- when you have time, can you shoot a kind of "establishing shot" showing the whole rig with platen in place? And if you're really strapped for things to do, can you show your platen going up or down in several pics or a video? I think your design lends itself to that kind of presentation -- just my opinion.
I love the clamp construction. Quite a few of us have discovered the half-jillion ways to use clamps on these things. Weights -- that's new to me.
I'm attaching a picture from the PDF. I know the file attachment system here is pretty cumbersome, but if you share pictures directly in the thread, it seems to help stimulate discussion.

- Cubism_Overview.jpg (105.8 KiB) Viewed 460 times