One learns so much from the "first time around". I plan to take what I've learned, go a bit slower, use better materials (like 3/4 inch Baltic Birch plywood) and add the things I was missing - like limit switches and some better resistance to torque. Here's the new design. It's all on Google Sketchup in the event anyone wants a copy. Just add a comment or send me an e-mail WoodWorkerB (at) gmail (dot) com. Here's how the new design will look.
I am considering incorporating small brushes on the bearings to keep them somewhat clean.
I will "tear apart" the drawing and create my cutting guide. I plan to start cutting and assembly this weekend.