Hay guys, how do i adjust the motor on my JG mp5? My G&P m4 has a screw in the plate at the base of the grip that you turn to move the motor up and down but my mp5 does not have this. The problem is that every time I pull the trigger it makes this screeching noise and doesn't fire which I think is from the motor being too pushed up and too tight against the other gears which could be easily fixed by loosening the screw on the m4. Is there some way to adjust the motor? If not how do I fix this screeching problem?