OK another one of those R&D days.. too windy to fly but need to check range... Powered up the phantom... put inside a car and drove it 4km away and took it out of the car. Immediately as it came out of the vehicle RC end locked onto the phantom and we had a link up. Took a screenshot just to show that it can be done.The only downside is as soon as soon as you power up the phantom the Home position is locked 13,000 feet away and you will now show 0 feet travelled. The potential is great.. limiting factor is battery life. No need to panic about radio if you got LOS. No need for Amps and big bull antennas. Going to mod the controller for external antennas to see if I can take this 10 miles but hey at the moment I am happy.