Hexacopter is very impressive. Frame and legs are of ultra-high materials. It will survive even in crashes. Build your own custom made copter with PCB board and east to comprehend manual. Copter is straightforward and it will be done under two hours. DJI F550 is not ready to fly out of the box type of drone. But here Flame wheel id for you. Hexacopter is now available at electroway.org