"WOW!

Super work, this helped me a lot.
Keep up the great work.

Thanks / Mikael"

"Hello,

I have a simular problem. Quad , x mode apm 2.0 board.
It flies perfect for about 20 seconds and then it flips backwards to the ground.

Every prop is balanced and the Apm sits on a plexi board with vibration dampers from a gyro, the…"