I want to build a trike with the seat over the?rear axel so I have a lower center of gravity. I don't know what hub to get to go from the transmission to the axel. they don't come with kits. and also. my bike has a 36 tooth sprocket. all the engine ask what sprocket and hub size. ok want to pedal if it breaks down. and that's it so. I've seen some setup but don't know what parts I need. can someone help me. figure it out. I have a single right side drive axel. and will eventually get the axel with a differential from uttrikes. but for now will do single drive