Just curious as to what other folks are doing regarding balancing the gimbal with different cameras -- assuming you find the balance point for the gimbal, how are you marking the setting for each camera with which you fly? For example, I use a CX760 and a 5DM3 and I have to reverse the orientation of the camera plate (obviously) tweak the fore/aft position of the camera, as well as some lateral adjustment on the forward transverse boom. I've used a silver pen to mark the lateral position on the forward transverse boom, but the ink wears off pretty quickly, so I was thinking of cutting some alignment jigs out of acrylic on a laser cutter. I've not found a good way of marking the fore/aft position of the camera on the mounting plate -- it seems generally quicker to pop the tilt servo belt off each time and re-balance it from scratch. The other related questions is: do you do the compass calibration with the camera mounted or not? The argument for doing it with the camera mounted is that the camera's going to influence the local magnetic field. The argument against it is that the weight of the camera (especially the 5DM3 + 24mm lens) makes the calibration twirling awkward and ugly. Thanks Andy.