To save you some time our team tried the AndyMark Hub but the wobble factor egg shaped the hole on the hub. Then we tried to reuse the hub by drilling it out to 3/8" and rigged up a belt drive with a 1:1 ratio. That to failed mostly due poor drilling and not enough support. We now are waiting for this
http://www.vexrobotics.com/vexpro/ge...planetary.html which can be changed to 1:1. Using a hex hub and locking collars from AndyMark. We are also an inexperienced team and got the idea from another post hoping this will work for us.