I have seen some videos on YouTube of people using headtracking on their P2's. I realize that to do this I would need to switch to a new radio but am wondering how many channels would I need to do this? I am thinking of getting a spektrum dx8 if it will work. Also is it possible to move the h3-3d in all 3 directions with headtracking? For those of you who have done this what are some of your experiences/results with headtracking on your P2? Is it something that is actually useful or not. Just FYI my set up includes a P2 (2.4ghz), complete fpv set up with h3-3d gimbal, Dom HD goggles.