The best aerobatic planes are inherently unstable. I still have a Yellow Cap 10 B., well actually on my third one. It will do two lomcevecs pivoting on the wing, one on top of the other then go into a knifedge spin,if you hold the same controls in, with the wing perfectly vertical and the fuse spinning around it. Never had another plane come even close to the aerobatics. Yet when you put the flaps down for landing it's a *****cat.