I just wanted to share this. The photo is of my Hexacopter running Ardupirates r527 code. I was testing the altitude hold and flight characteristics at 10,500ft elevation. Well, more like 10,550 from the photo. The Hex flies great and the altitude hold works perfect not mention the battery life is quite descent at this altitude. Usually at an elevation of 2,300ft I get a flight time of 14 minutes but get 9 minutes at 10,500. It was a pitch black night when the photo was taken so all the light is from the LEDS. I hope all like the shot.