I have a miniature aircraft gasser that keeps tearing up the plastic gear teeth and has also so much force twisted the tail rotor tube so I put screws in it to lock it in place. I have had everything apart multiple times and have not found anything. I have sent all radio equipment and servos into JR to check them out and everything was OK. I have a second Heli just like this one and never had it do this. Does anyone have any ideas? Thank you.