Brand new P4 - out of the box first three flights went perfectly. Fourth flight the camera gimbal was limp. Next flight the following day camera gimbal worked. But now it won't work and has not worked the last several attempts. I have put the P4 on a level flat surface (measured with a carpenters level) and recalibrate. I did the "cold calibration" putting the p4 in the refrigerator overnight to cool the IMU and then recalibrate. Still no luck. And, I also just loaded the latest firmware 6/6/2016 version on both the controller and the P4 - still no luck. The P4 flies fine but the camera gimbal just hangs limp. I really need the drone for a project next week and don't have time to ship it for repair. If anyone has any ideas I would welcome your thoughts. Thanks. Also, if anyone knows how to get the drone repaired more quickly, I would love to hear about that as well.