When I crashed mine it loosened the Tail motor to the point where the mesh looked ok but when the motor was torqued it would pull away from the gear. but it maintained minimal contact to just make the tail rotor spin. But I had no tail control. didn't figure it out until I sat down and started pulling and wiggling things. from first glance it looked like it was all meshed up fine, even when i tried to spin the blade by hand it had tension. I tried to tighten the screws on the tail motor and that's when I found that it was loose.