I built a DJI F450 - Naza M V2 w/ GPS, E600 propulsion sys, use a Zippy 30C 4S 8000mAh Lipo; added a landing skid with arms/brackets for fpv and video camera mount. Up till a week ago my flying was without problems.
Had just begun adding FPV equipment - DJI Mini iOSD, Boscam 5.8gz 200mh video TX...