I have the eflight upper and lower rotor heads, swashplate, shortened flybar with silver bullet weights, and a microheli upper bearing holder. i also have a boomtown hobbies tail boom on there which is lighter than the stock tail and Xtreme 180bb motors. I love the way my CX2 flys. It is not the most stable CX i've seen fly but can hands off hover for about 10 sec without moving. Great manuverability when in forward flight. I think you just have to choose between stable or agile