Originally Posted by LittleMo
Did you ever figure out your problem there?
When mine did that it was because one of the main blades was cracked near the hub. See attached picture, you can also see that the end is split where the screw goes through.
How did you figure that out, changing blades and noticed it?? Mine every now in than just shakes than flies great haven't figured it out yet maybe I should check blades.