Dont know if this is any use to you guys but heres a link to my mavic 2 pro gimbal teardown and repair and then a follow up video on the process involved in getting it to calibrate following a gimbal yaw or roll arm swap ( seemingly due to the gimbal boards being paired to the motors in the arms from factory and the app calibration function cant correct it)
Teardown
Calibration process
Teardown
Calibration process