I have heard a lot about how the compass will not cause a flyaway. Well I had a bad crash, I had to replace the shell. All went well, I did a full cal. I test flew the P2 several flits. All was good. The diamond on the OSD was orientated rite. One day fly fine the next day fly fine- but one thing. I was lucky that I saw it before I got to far away. The diamond shaped icon on the OSD was of 180 degrees. When the phantom was facing away from me the diamond was in the center of the screen. And when it was facing toward me the diamond was gone. Now if I was flying and I tried to get back home with the OSD, I would be going away from me. And I checked this and that is what it did. Now if I had not noticed that the diamond was off, and I flew out of sight, I would not be able to get it back. And if it went in to RTH, where would it go ?????? And a compass cal, dance fixed the problem. So flame on. Because ,I know it happened. And your in put is valuable to me. Thanks.