one motor barely turned, didn't turn like the rest of the motors therefore I never got to fly, will update when I get a spare kit get. Received my replacement kit, everything works great, I'm glad I got the second kit! Customer service contacted me to make sure everything was fine, everything was fine and gave me 20% tks. On my second battery, the motor might disengage, I wanted to land on grass, the hub might disengage, glad it didn't happen in mid-air. The engine had a few issues early on and