I unscrewed the GoPro back connector from my 2D and put it in my 3D, but the screws for the mounting bracket don't fit the 3D. In other words, I can't attach the little C-bracket that holds the GoPro connector in the gimbal. On the 2D, the holes are slightly smaller. On the 3D, they're not only bigger, but they go straight through the back of the gimbal. Has anyone else seen this issue?