I finally got my RC-Expert 450 se flying right however it took 3months to work all the bugs out. The Airtronics radio does not have a heading off/on switch. Therefore the gyro stays on and the tail gets wild until you set the ch5 low. Now that this is done I need a new battrey. I think these folks provide a service at the lowest cost to people like me that are not able or to lazy to build my own heli.