[R.C.]

Bill,

The things I would change:

-Don't use a full versasblock per gearbox, use 1/2. And mount the gearbox so the face of the gearbox is flush.

-Use the WCD 2 CIM DS and ditch the belts inside the tube. Go to 18T sprockets and run chain, you'll be much happier. If you still want to run belts, I would read some of the posts/docs on here about tooth size and width of belts.

I would comment on the electronics layout but Austin has me beat!