I recently purchased a Phantom 3 Advanced and the 2nd day I had it, I bumped a branch about 3-4 ft from the ground and had my first crash. Everything seemed undamaged, except for the gimbal yaw arm- it was bent. Despite the bend, the camera worked well and was just slightly off center, until I ran the gimbal auto calibration and it looked straight. I recently purchased a replacement aircraft grade aluminum yaw arm from ATKDrones.com ($100) and now it pretty much looks like new. However, each time it starts up, it appears off center, but running the gimbal auto calibration sets it normal. I haven't run the IMU because I just bought a new 4k camera, but that might help the issue. So the camera/gimbal was in a crash, the yaw arm was damaged and replaced with a better part, but it still required me to run a gimbal auto calibration at each start up the last time I tested it. The video feed works well, it records like normal, the start up alignment is the only issue. I'll include some photos as well. Let me know if you're interested and make an offer.