I bought a maximum st 2 months ago just rolling chassis as just getting into the hobby of rc nitro. i rebuilt the whole truck. i went with a OS max .18 cv-r for the powertrain...love the motor...very powerful (i think), but i keep breaking the teeth off the spur gear, went threw 6 plastic ones and said why not metal...now with the metal ones im chipping the spur and tearing up the clutch bell. ive gone threw $150's worth the gears this month alone. am i doing something wrong. everything is lined up right. the gears are close together, and centered this is the only problem im having with the truck. i had one occurance with rounding out the diff gear but a new one solved that. i finally got a hardend steel clutch bell made by robinson, and before i go out and buy another metal spur gear i was hoping someone could tell me what im doing wrong or a easy solution.