Well, the first thing is first, you must get a FBL head. In all honesty, after dealing with the DFC on a 600 and a 450, I would get the "V2" head with the swash drivers. You should be able to find these pretty cheap. As for my 3GX, I'm still thinking about it, but if I do sell it, it will be $75 with version 3.1 installed in it. It will only include the gyro and the dongle, not the wires for a 6ch Tx since I need to do some videos with it. But, got to get a 6ch Tx first lol.