Okay im laughing a bit at this whole refridgerate your phantom to get an accurate IMU calibrate. Who started this idea? Did an engineer from DJI recommend this or some geek from one if the forums. I have never stuck any of my drones in the fridge to cool down the IMU, besides my s900 and 4 foot kraken wont fit. haha My p3s, Inspires, and now my p4 fly perfect following the factory instructions on IMU calibrations. But you know what I do for successful imu calibrations, I stand on one foot, and close my left eye and say a hail mary! Thats what everybody needs to do when calibrating the IMU!