Tip stalling can sometimes be alleviated by "reflexing" the ailerons. RAISING (that's right) both ailerons 1 or 1.5 turns on the clevis will in effect reduce the wing tips' angle of attack, thereby improving stall characteristics.

If you have a computer radio, you can set this to work only on landing which would preserve the "snappyness" for tumbling maneuvers.

There's a reason the old Cap 21 was called "Snap 21"