I set up my gov to 2200rpm max (Trex 550e). When I start the motor from idle 1 (90%,zero pitch), the headspeed RPM overshoots over 2200RPM, and tail servo doesn't work properly, and I have no tail control. However if I flick the autorotation switch, and then restart again the motor, it settles 2000rpm and the tail servo works. Why do you think that is?