Nah... still haven't got an mCPx.
Dunno if I ever will - I have my Copter-X 450 if I feel the need to get into 3D Heli. Although, granted, the mCPx would be a better machine to learn on - given its resilience and lower cost-factor if it does end up ploughing in too hard.
That's the thing with the 450 - a "mild" crash and the top-end is rooted. Blades, flybar/rods, feathering shafts, main shafts... *aaackkkk*
Now get that 'Bear in the Air - y'hear?!?!
BJ