hello, i was wondering, why coudnt you flip a hd hub around and use a 7 spd cassette or whatever u would use for bike gears on the engine side? Then use a normal one spd freewheel on the pedal side? This would allow you to shift gears on the engine side without a jackshaft kit, ie no extra rotating parts , and much simpler. If its an issue with the hub not accomodating it this way , then maybe someone can make a hub that would. or a motorcycle type trans that is on the motor itself. Just asking because it seems to me a way better way of implicating a drivetrain. Tell me what you think.