Hi Spy,

I'm not sure, but you might want to be sure that the 2200 battery is not too heavy for the CP2.
I think that as far as spare parts go you might consider a crash kit for the CP2, I think they make one for it (just not sure).
It would likely consist of set of main blades, tail blades and some landing gear parts. I'd want to have a couple pieces of small fuel tubing like the one that holds the tail rotor on in my kit, in case that comes off in the grass.

Hope I'm not steering you wrong ...