So the camera gimbal is cool but I was wondering if anyone manage to attach any other accessories to their Phantom. Say a retractable grapple, flood light on/off, Nerf(tm) missiles , etc. So much fun to be had. The radio clearly has unused channels and there is one empty connector in the transmitter (but it is away from the other channels so not sure of it's function). Anyone manage to add an additional control channel? If so what did you do with it? If not, what *would* you do with one?