Why Posi-drive Pulleys? What We thought we were Getting: Cheaper than the Gearbox! $150 Gearbox $88 for two pulleys and a belt Lighter! Lost about a pound Better distributed weight Consistency of Design! Everything is belts/pulleys or sprockets/chains Cool, New thing!

Why Posi-drive Pulleys? What We Actually Got: Slippage The belt comes off once we get it going A Screw Loose The set screws loosen Dangerous at high speeds Not effective Frustration

Our Options: Pros Cons Pros Cons Try to Solve the Posi-Problems Use the Angle-Gear Pros Still the cheaper solution Cons Need to do some major thinking to make it work Pros Can return if it’s not what we want Easy Cons Expensive! Slight redesign for Differing Shaft size Need to Purchase a coupler

Further Issues No Refunds for these The AngleGear puts us over budget Bearings are too stiff McMaster- “Designed to be stiff” Can’t return anymore Can’t Return things to SDP any more The AngleGear puts us over budget If we are to buy the coupler and improve the bearings we will need more money.