Inspire 1 fails to calibrate now and tail-light give solid red code for - critical error. Running IMU Calibration fails at 3%, 10%, and on occasion 30%, never completes. The error given it has moved but it is on a flat surface with any interferences minimized as I have read in other forums. I've done typical troubleshooting techniques like reboots, fresh installs, firmware upgrades, swapped out RCs and iPads. I have a support ticket in with DJI but I am "in the field" for a limited time so need to resolve ASAP. Any helpful advice is appreciated.