Put my phantom into a new shell last night, the first flight after that was a disaster. I felt like I was fighting it the whole time until I lost the fight. It's almost like it waited a min, then picked a direction and accelerated in that direction until it hit a tree, second flight, ground, third flight, house. I hooked it up to naza m assist and re calibrated it with same result. No compass errors, all leds flashing green! Doesn't matter if I'm in ATT or GPS mode. Any ideas on what could be the issue? Also, one of the motors seems to have locked up, is this a result of the crashes or the cause of the crashes? Could a failing motor cause the phantom to fail so spectacularly?