Best range without windsurfer was 2200 feet out at 350 feet altitude. I would normally average 1800 feet. Using a homemade windsurfer I could get 3112 at 350 altitude. This is in a fairly wooded area keeping LOS at all times. Considering the landscape, I'm pretty sure there were fresnel obstructions. I did find that the WiFi antennas are partially blocked by the windsurfer. I was getting some low video signal messages and quality did drop after 1800 feet where video was still strong without the windsurfer. I figured I would share my findings for anybody who might be interested.