Not sure how a 11.1 lipo and worn gears figure into a FF issue but I'm not the brightest bulb in the pack.
theman1990......... there are a couple of sites dedicated to improving the CX2's flight characteristics and behaviors. I think your main problem is that the flybar will always brign the CX2 back into a stable hover. The downside of a begginer heli.
However.......there are fixes to improve FF with a slight loss of stability. A shorter flybar will not have so much of an effect on the upper blades and allow you to "gas around in FF as much as you like.
check out this site and see if anything catches your eye:
http://www.heli-max.net/mediawiki/in..._and_CX2_Setup
Also the Eflite forum under electric heli's has alot of info on the CX2's as well as a great bunch of guys who collectively make Einstien look a lil lysdexic and slow. Look here:
http://www.rcuniverse.com/forum/forumid_447/tt.htm
If you don't find what you are looking for, post in the Eflitre forums and somebody will have either done that, tried it or witnessed it firsthand.
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Of all the things I ever lost....................................... I miss my mind the most!