well now that I have put in the new carbon fiber shaft the woble went away, but now the gears make a bad grinding noise and the lower rotor stops coasting bfore the top after i turn the rotors on and off. The grinding noise is only made when it first spools up and really happens when you turn them all the way off. But other then that it sounds normal between that. This in turn has made the heli pretty unstable. it seems to go where it wants... any ideas? thanks