[Max Lobovsky]

I'm not sure what their reason to discard the first stage for the CIM was, but there is a very good reason I can think of. The gearbox is surely designed for a very high rpm, low torque motor (like the drills from our kit of parts) and the CIM probably has 2 or 3 times the torque of the motor it was designed for. A mas produced gearbox like this is most likely engineered down pretty close to the specs its needed for. It wouldn't take 2 or 3 times the torque.