I had a small vibration that was just enough to cause some 4K jello and narrowed it down using individual motor tests to one of the V3506 motors near the gimbal. I ordered a pair of these bearings, which is Sunnysky brand packaged, and that motor is now amazing. It is the smoothest of all of them. I just ordered enough for the rest of my motors. It is slightly different than the ones that came stock in my V3506-16 700 II motors. Same dimensions but thicker rotating center hub.
