AlfaRC Cub2 O4 is a frame for building a compact 2" drone with analog or digital video transmission, including DJI O4. The motor diagonal distance is 88mm. The bottom plate is CNC-cut from 2.5mm thick carbon, and the top plate is made from 1.5mm thick carbon. The frame weighs approximately 15 grams. The FPV camera is mounted in a 3D printed front section that also includes a fin to aid in turtle mode and protect the battery.