This Quadcopter Frame supports New design PCB board for standard 50mm controller board like MK, KK, FF, MWC. - Installation is simple and ...from Google Alert - quadcopter http://j.mp/2HSgklKvia Tommy Gerlado
https://www.tommygerlado.com/2019/02/quadcopter-frame-f450-for-dji-kk-mk.html