I just wish I could get the 800m as claimed by retailers. Anyone else having issues with FPV and RC losing connection around 500m/1640ft? Flight after flight in good weather I am unable to go much beyond 500m - My best days may slightly go a little over 550m. Of to try yet again. I have enabled FCC and also moved the screw in back of controller clockwise all the way with good resistance but not too tight. ???