I've had problems with the tail wagging on my Titan as though the gain on the gyro is too high, but even with a different gyro this still happened. (gain was set to <= 30%) In the end I traced it to the tail servo, changed this from the Ace RC C1016 to a cheap servo I had and problems gone. Gain now set to 50%. Servo seemed fine, so what was the problem? I realise that I need to put a decent servo in, what do folk recommend?