GEPRC DoMain 3.6 is a frame for building a smaller freestyle drone for up to 3.6" propellers. The frame is a suitable alternative to the classic 5" drone if you don't need to carry GoPro cameras or fly in a smaller area. The frame has durable arms made of 4mm thick carbon fiber in a Deadcat configuration, where the distracting edges of the propellers are not visible in the camera image. The camera is protected by 7075 durable aluminum alloy sides. The frame accommodates stacks with 20x20mm hole spacing and AIO boards with 25.5x25.5mm holes. The rear of the frame has space for installing a video transmitter. The frame can accommodate analog and digital video transmitters including the DJI O3. The frame accommodates motors with both 9 and 12mm M2 mounting holes and 3.6" propellers. Also pleasing is the permanently attached XT60 connector that makes battery handling easy. The frame also includes a mount for the Naked GoPro.