I have a problem that you may be able to help me pin down the cause of. I'm getting slight (but very noticeable) vibration in my video. It increases with the airspeed of the unit, but is often present while hovering. It is NOT the normal yawing of the plane which the 3D is supposed to address, it's tiny vibrations that I can't see FPV but which appear when I replay video @ 2.7K/30 fps. I have replaced all four engines & props & even shell in an effort to fix this; balanced everything, etc. Can this have to do with the gain settings in the Assistant software? I haven't changed them from stock because it was, until about a month ago, rock steady. Anyone else have this issue?