Just replaced all four P3P motors with Tiger Navigator Series (White Version) V.3.0, installed as per T-Motor instructions packed with New Motors. After install the go pilot app is reporting obstructed motor error, from random motor on each attempt to start, after three to four tries, all motors start and after a low hover test flight, the P3P shakes like crazy, all my props are balanced, I adjusted the gain in the go pilot app, got that fixed, has anyone had this problem after motor upgrade, these motors got good reviews on youtube. I called DJI for some tech advice and got nothing, and there was nothing special to do when installing new after market motors, I told them that they had repaired this P3P for a crash from the first owner and replaced one motor and repaired the camera gimbal, and thought that the main board mite be the problem, they did not recommend the consumer do that work and should send the P3P into DJI for service. I thanked them for the advice, and wished them a nice day. P.S. This P3P in not under warranty. I thought the main board was bad in the P3, just installed new main board, I did all firmware updates, relinked the controller with air frame, IMU calibration, and still the same problem, really need an answer. any ideas would be really helpful, Sorry about this long post ! Hope someone mite shed some light on this, thanks for reading this post.