Wnuk,

I always post this link, has great information on battery, motor and pinion combanations. I may be wrong, it's been awhile, but I think the CP and NiMH combo, comes with a 10 tooth motor, you may have to get an 8 tooth or 9 tooth, read the link stuff.

A 910 mAh lipo, gives you the best of both worlds, light and long duration. Anything bigger, adds weight. Depends on how you want to fly. Bigger than about 1200 mAh, it won't fit in the stock CP battery tray, to big.

Crashcrash is right, you'll have to get a different charger for lipo's and re-adjust your proportinal and gyro trims. The lipo's have a ton of more ummph.

Here's the amazing link: http://www.hobbyzone.com/articles_ef..._bulletin.html

Just more things to think about and dwell on, and $$$$, but it's fun...

Dave / Choppersrule