They do seem a bit sensitive to interference. My house wifi was set to the immediately adjacent wifi channel for 2.4 GHz. Since we can't change the wifi channel on our P3Ss (ugh!!), I switched the wifi channel on my router and immediately starting getting better range for the video signal. Your situation seems a bit different, though, as you lost the 5.8 GHz signal, which isn't as common of a carrier frequency. I'm certainly interested in what you end up with if you are in an isolated area without interference. Out of curiosity, at what altitude are you flying?