I don't understand why a drone needs to be flying in the close proximity to a glider port. As a drone flyer and a pilot of gliders and powered aircraft, I see no earthly reason why you should be dabbling in the vicinity of an airport that is a...
During this 'compass needs calibration every day' period, has you always been working in the same general region? Did it keep happening after moving far away from that area?
I'm just wondering if there is any kind of interference in the area...