im,
I have seen so many idler wheels on backwards that I took a shot at that. Good you have the black belt setup.
My first graphite chassis had the holes for the spur slightly out of alignment. Spur gear sat at an angle to the belt.
What!?! It's not fun reading 437 pages of this thread? You are lucky that Randy Caster doesn't post so much these days...Then it would be a thousand pages...