OK OK
Let me clarify some stuff
1. It WILL be made of polycarb, when fabricated properly it is as rigid as aluminum.
(but thank you for the warning, we will take it into consideration. Although 3/8 in polycarb is more rigid in small distances than people think.)
2. This is a RUFF prototype, but it is the ruff size/dimension of the real one. ( The "pulley" for the belt will be bigger for more teeth engagement.)
3. Bearings and bevel gears are just what we had laying around. They are not the final ones.
(the bearings are the really crappy kit chases ones i believe.)
4 I know I'm missing stuff, But this was just a quick update, although i would like to say. I believe it is beautiful.
OK i remembered, we are working on mounting it on the front of a frame with 2 casters in back to test it, although pre-tests of the grip and pull of the 3/8 in belt was kind of amazing. We will probably still go with thicker.
Btw, Belt on carpet = Amazing Grip.