I decided to add 1/2” to the rudder (front to back) . Pictures show the original and the new. Not a whole lot of difference. I am going to redesign the elevator/horizontal stab as well. The hinge line for the elevator will move forward about 1 inch. The counterbalance for the elevator will be enlarged as well to bring it more into scale. This will reduce the area of the stabilizer bringing it more into scale of the full size. It should help with aerobatics, albeit I will loose a little stability.