I recently bought a Phantom 2 with gimbal. I have a gopro hero 3+ and I have been flying that a few days enjoying it. I have the AVL58 and the iosd mini I plan on installing for fpv. I was curious about the best placement of these two additions to the heli. The idea of the best center of gravity makes sense. But I haven't found anything online saying where the COG is. I assume from reading online that the naza makes up of things being out of balance. But for the sake of being picky & wanting things to be right, Id just like to know is there a way to check the COG or is there advised places to mount the hardware for the best possible COG with this type of setup.