Had my PV2 for a few months now and flown it about a dozen times, no problems. However, I tried it the other day in the drive way and it wouldn't hover in the same place, it continued to drift backwards. Little to no wind to speak of. I brought it into the house, re-calibrated everything, took it out and did the compass thing (away from the house) and it still was erratic. Hmmm. Came back in, did the advanced calibrate etc and it finally seemed to hover close to one spot. Any ideas? I purchased a new compass module but have not installed it as yet since the weather was not very conducive to flying. Spring is finally here!