[Justin Stiltner]

I had thought of this same drive train before, the only major issue I had was how to do a speedy turn, you could lock one side up and power the other, but you cannot apply foward to one, and reverse to the other, you would slip sideways. But if you did make theise with deep threads around .5 and pretty thin like 1/8" I think you would get enough penetration into the carpet to get some nice traction. hrmmm... (starts stareing at his box of old printer parts and wondering.)