AviatorDown, Please look at the name of the title of this thread. If you have nothing to contribute to that subject then mind your own business when it comes to my questions/comments on the subject named in the title. I won’t respond to any more of your replies and I thank you not to respond to any of mine in this particular thread. I am glad the drift issue is resolved. I used to fly airmail (almost 50 years) ago, IFR, night over Nevada every week night and had to reset the gyro about every 2 minutes to keep it within 10 degrees. I would write it up frequently but the company never fixed it. Oh the good old timebuilding days when any multi time was gold. Peace.