I struggled with mine for a while, but now its pretty easy. CG is at 5 1/4. Very slight amount of right thrust, and about 1 degree of down thrust. Lateral balance is important too. Hovers pretty easy once i got the hang of it. For me the trick was getting used to the rudder. Only tiny nudges necisary. 6 volt battery on standard servos or faster servos seems to help.