I need to know how you know what spur gears work with what pinion gears? I just put a a steel 15T pinion in with a plastic 50T pinion and it didnt last but a second or two... i know i probably should get a steel 50T pinion but havent found one yet! ??? I also have the CC 2200KV, probably to much for the plastic anyways but Im thinking the gears and to match up math wise, am I right? and If so how do you figure it out? thanks for the feedback!