Aus They make some nice GPS addons that run off your RX pack (i run one off my seagull dual ace, two OS 55 AX's and enough servo's to run two decent pattern ships). Look on RCUniverse. They even have Airspeed probes and other things too so you can get real airspeed readings. The other thing people are doing is running a camera in the pilot seat with a set of VR goggles, so its like you're really flying
