My phantom 2 has been vibrating off and on, but mostly on, for a long time now. It's bad enough to the point where most footage has to be stabalized in post, in order to be acceptable. It seemed to have started right around the first time I put the Hero 4 on the gimbal a couple months ago. I've done multiple calibrations, basic and advanced. I really have no idea what it could be or how to correct it. Any suggestions would be appreciated, thanks!