Originally Posted by zadaw
If you heli drifts, it suggests that the the ail-elev gyro gain is not enough. I suggest that you adjust your left pot up to the position shown in my picture. If your heli starts pitching up and down at a low frequenc, then you should lower the gain setting.
The tail gyro gain is adjusted through a channel on the transmitter. This has been the case for some time with most tail gyros.
if it drifts it could also be mechanical setup....make sure the swash is level when you have your throttle at 50%...also when you do this make sure the throttle and pitch curve are linear.