use the 9X5 or the 10X3.

It will do nice loops and rolls, and can do some inverted flying. Cuban 8-s it will want to veer off track, but its correctable with proper elevator and rudder coordination in the 1/2-rolls. It won't do an outside loop safely. foreget trying any 3D stuff or hovering.

Its a good trainer and can do quite a few aerobatics. Its capable of everything in the previous (2 years ago) AMA Sportsman Pattern, and could have even won contests with a good pilot... (but then... even a scale cub could do that...)