So, got my brand new replacement P3A via courier today. It's on fw 1.4 and I thought I'd leave it there for now. I've done the IMU calibration in an airconditioned room, I've calibrated the gimbal. Took it out to the local football oval (where I did successfully calibrate the first P3A) and I can't calibrate the compass. So I move about 15 metres away and try again, nothing. Moved to another spot, still nothing. 4 tries in different locations and all the same message. So I come home again, and try to calibrate in the empty rural block next to our property. Same issue again, won't calibrate the compass. I had NO metal on me all, no earrings, watch, rings, nothing. I didn't have my iPhone close to the P3A, I set that (attached to the remote controller) on the ground and moved away from them each time. iPhone was in airplane mode the whole time. The first unit I had two days before there was an error with GPS dropout...now the replacement unit won't let me calibrate the compass. Right about now I'm ready to tear my hair out.