I am experiencing the servos slowly drifting when the model is perfectly still and gyro active. As soon as I move the control stick the servo for that control will centre but after a few seconds the servo starts to drift if I leave the stick alone. It happens in both normal and heading mode but not off course when the gyro is off . It seems worse the higher the gain setting.
I have flown the model (the gains are quite high at between 60-80%). It happens only with the elevator and rudder servos which are S bus servos (futaba) connected using powerbox S-Bus connectors and leads to Sbus output on the Royal (It makes no difference which output). I have no trouble with the same Sbus aileron servos that are on the other Sbus output.
The Royal manual does mention this could happen but says zeroing the gyro should solve it which it does not. I have the igyro srs and Mercury SRS in other models and on these the control surfaces are perfectly still at normal gain settings when model is stationary and gyro active.
Everything else for the Royal gyro is as per the software default.