AntiRoll is developed in collaboration with well known parties such as MARIN, TNO and TU Delft and patented.
The heading indicator or directional gyro has an axis of rotation that is set horizontally, pointing north. Unlike a magnetic compass, it does not seek north. When being used in an airliner, for example, it will slowly drift away from north and will need to be reoriented periodically, using a magnetic compass as a reference. 
I have the same problem, did you fix it? please help me, thank you very much.