Been doing most of my long range testing in more rural areas. Decided to fly in a more urban area to a local High School 3km away. LOTS of interference (wifi everywhere, power lines, cell towers, trees and a hill), never lost FPV or control. Did a full 360 to be certain that I had full video in all directions then, because I flew with the wind (not a good practice), I headed back right away to be sure I could make it back. Unfortunately, I had to fly back pretty much directly into the sun.