Well, if you really want to, just take it outside and lay into some FFF. Beyond a point the top rotor intersects the bottom and they "interfere"-- i.e., hit each other. You can do it at will by accelerating hard and then pulling back for a crash stop. Ask me how I know.....

Seriously, I gave up flying mine outside a long time ago, because all it took was a moderate breeze and I'd clack just holding position into the wind. If you want to fly outside or start more ambitious maneuvering, the better answer is to take the money you'd spend on those upgrades and put it into an ESky HoneyBee FP3 (if you want to stay with simpler helis) or a King v2 (if you really want the whole experience). Either one is harder to learn, but ultimately flies a lot better. [edit] BTW, the FP3 is a pretty easy step up from the CX. [/edit]

The FP3 can do more strenuous maneuvers and it's built like a tank, but it's a motor tail heli with all the restrictions that implies. The King is a full CP main and tail heli and despite its price is a blast to fly.