Wholesale stabilization problem !! Helicopter unmanageable by forward or backward without being asked, same for the right and the left. However it turned out very handy and very responsive after removing the hull builders ... they have tested the Chinhook without the shell? disappointing all the same, he had to disassemble the object to be something acceptable, ca seem crazy, especially as we lose the aesthetic of the product ... In short, there CHEAPER AND BETTER !!!