After 2-3 weeks nightmare I am finaly flying 100%. Until this time I has strange motor problem. Motor was stopping spining for 0.5 seconds and spining againt for full speed. Main Skywalker 40A running with new firmware version 10. Thank you to www.olliw.eu

- 15" carbon proppelers

- Hengli 4822 690KV motors

- 5000 battery

- Arducopter Mega 2.5 with default setting, no pid adjustment, no accelometer calibration.

Video for inspiration how to secure fly in room. Dont look on mess around.