Erdog 7

 Erdog 7 is an affordable frame for building a long-range drone with both analog and digital video transmission, including the DJI O3. The Erdog 7 weighs 231 grams including 3D prints, which is acceptable for a 7" drone. The bottom plate is cut from 3mm carbon, while the arms are 6mm carbon. The frame can accommodate stacks with 20x20, 25.5x25.5 and 30.5x30.5 mm hole spacing. The rear of the frame has space for mounting the video transmitter and mounting holes with hole spacing of 20x20, 25.5x25.5 and 30.5x30.5mm. The DJI O3 can be mounted in a prepared 3D print. 

Thanks to the long body of the frame, the drone can also mount larger batteries and a GoPro at the same time. The camera is mounted in the carbon sides. The FPV camera is positioned far enough forward so that the edges of the propellers are not visible in the image.