One thing to watch out for is the tail drive pulley stipping off the shaft and your heli doing out of control piros. This is the white small pulley that the tail belt loops around on the fuselage end of the boom. I would recommend replacing this ASAP with a shaft with a metal pulley (before it fails, because it will). I used the one for the SE with the pulley already attached (can't recall part number) and it seems to be holding up.