So yesterday I had a small crash, nothing major from about 4 feet up, managed to break a prop but all seemed OK. Today I head out for a fly and my Phantom started acting really strange. I did a compass calibration and got the green light. As I took off I noticed the Phantom really struggling to hover in the same place, it would start accelerating backwards on its own and drift around.... not good So, I landed and did another calibration and took off. Everything was now OK'ish, still a slight movement whilst hovering. So this is where I made a big mistake.. I was flying pretty high, getting some shots and all seemed OK until I started to bank a turn, the Phantom would pitch on it's side and then start accelerating towards the floor! In my panic I switch to ATTI mode then back to GPS mode and it seems to stabilize again for just a moment. As I descend the Phantom really looses control and banks right on its side and accelerates towards the floor, I tried to save it but it was too late. I hit the floor pretty hard. Bent my landing frame, fully broke my Feiyu Tech Gimbal Here's the video of the final disastrous moments; http://youtu.be/_M9ktGZMI_E I've been flying this thing long enough now to know that this wasn't pilot error, there was something else going on here. It seemed like every time I'd pitch or roll the Phantom wouldn't return itself upright again. My mistake was that I shouldn't of flown it if I wasn't 100% that the thing was flying properly. All my gains are left as Default and everything is updated to the latest firmware. Anyway, any ideas whats caused this? Could it be the stock controller? Or something wrong with the compass? Any help would be great as it's already destroyed £140 gimbal. My cheap FPV kit seems indestructible though!