I have 2 Phantom 2 non-vision, one is version 2. On the version 2 I added all the same components, iOSd, Xmitter, Flytrex etc as whats on my version 1. I was attempting to try the GP4, with battery removed on a HD3. When I installed and tested I noticed at hover the gimbal was vibrating. If I dampened it by putting my hand on the legs it would settle. I have tried 3 sets of ballanced props that work on my ver 1. I even put the ver 1 H3-3D with Gopro 3+BE and it still vibrates. The only moving component left is the motors. When Idling with or with out props I don't detect a vibration. Anyone have a bad motor cause this? For the record my ver 2 has the ESC without markings. Thanks.