I am having trouble figuring out the functionality provided by plugging the h3-3d into the gopro. I thought the function of the gimbal was to keep the camera level and steady. It seams that all the electronis for doing that would be in the gimbal...not in the camera. What happens if I don't plug the gimbal into the gopro...what does this prevent the gimbal from doing. I ask because my h3-2d went belly-up and had to buy the 3d. While waiting to receive, I found that I could not do fpv the same way I was because 3d needs the USB port on the side of the camera. I know I can buy the add-on connector to free up the usb, but it really bugs me that logically, I can't see why the gimbal needs that connection at all...is to simply to power the camera to extend battery time?