hi guys!!i was out flying my nexstar the past few days and having problems with it.it has just been repaired after a minor crash which busted up the fusalage a little bit.the problem i am having is it doesnt fly level,it dives down even with it trimmed all the way back.the ballence is a tail heavy just to get it kinda flying level with it trimmed all the way(added 6 -1/4oz weights)i would think with it being tail heavy it wouldnt dive but it does.the elevator is centered fine.what should i be checking?i put the wing across a flat surface and the leading edge is up a tiny bit??please help anyway you can and if you need more info let me know..thanks guys..