Have stock 4*60 with clipped wings. I understand there are two common mods which really help the aerobatic performance.
1. Rudder increase of 1 inch.
2. Elevator increase of 1/2 inch.

I would like to know who has done this and whether it helps.
Since I'm on it, I would pay for someone to frame a rudder up, trim it with red monokote. Name price.
Mike
Memphis