I am new to both quads and rc in general and have had a steep learning curve. My craft was bought second hand and is based on a naza lite controller. Flights so far have been good with one exception, less said. I am becoming very nervous about high flying which I want to do for arial photography. When I get to a reasonable height the craft tips forward and backwards quite alarmingly and is difficult to control. As soon as I drop the height it settles. Am I getting out of range of my tx (spectrum dx6i) or am Ijust hitting what I would call dirty air i.e. turbulent. Otherwise it will hover in front of me while i take its pictures beautifully