Hi First flight with camera and gimbal under my ALTA Apart from a lot of wind, it flew fine in Manual mode. As soon as I set it into Position Hold, it began slowly to vibrate. I could se it on the arms, witch began vibrating slightly up and down. I could see it in the light indicators but also hear it. When I turn it back to Manual mode again, and the vibration stops. I then mounted the black dampers, and I imagine that it helped a little bit. But the vibrations are still there. M-15 with BMPC 4K = a total of about 13.3 kg. Anyone have an idea for what it can be?