I recently stumbled across someone who made a snap on bracket for both the Zenmuse H3-2D and H3-3D which I received in the mail today from Shapeways. Shapeways is a 3d printing service and market place and I have found a few cool things on here not Phantom related but this was a savior for me.
You can see below that this bracket snaps onto the GoPro 4 and 3 w/o any issues. I also turned on both Phantoms to make sure the gimbal was stable and wasn’t doing any sort of weird dance due to the weight difference or anything else it might of not liked.
Below is a gallery of images with this new snap on bracket.