Apart from, possibly, increasing the rudder area, and using sheeting on the turtle neck to stop it looking like an emaciated horse, and replacing the tail wheel so it doesn't stress the rudder so much, I see no reason to modify anything on the SE.

I have built two; used 1/64th ply on one and sanded 3/16 balsa on the other behind the canopy, over the existing stringers. They both fly great, doing exactly what I ask of them.

-David C.