Flying Around with a custom built 450 Quadcopter

I built this 450mm X frame Quadcopter using the guts from a DJI Phantom FC40 Drone. It has a 3D Gimbal with a modified GoPro Hero3 Black Edition with a RageCam 150˚ Wide angle No Distortion lens. I'm using 2 3s 3000Mah lipos to get about 8 to 10 minutes of flight time. Also I installed a telemetry system and an enhanced GPS Antenna. It flies at 5.8Ghz and video at 2.4Ghz. I use a parabolic antenna booster on the remote and the video receiver. I have been as far out as 5000 ft and still have a signal. Can't go out far in just 8 minutes. Max 4 minutes out and time to get back home.