ladies and gentlemen, i would assume most of us nuts in here are male. i have been flying mostly planes for the last 4 years but started this addiction with a shogun 400 3d. what a mistake that was! anyway, i was asked to fix a cx2 recently and ended up buying one for myself so i could see how it was set up because it was nearly impossible to make it hover.(and yes i did read the manual at least 8 times) . finally got it! since then i have fixed 4 more and upgraded mine . there is one that still does the "toilet flush effect" but my friend says that it goes back to a center point. i am getting it back from him in a few days to try to figure out why it is doing this. i have changed the inner shaft, swashplate , lower rotor head . played around with the 3 in 1 unit it had matching blades when i gave it back to him. the swash was basically level. any quick tips or is it a matter of several hours of trial and error again? any advice other than" read the manual" would be appreciated .