Yes- old Hobie fiberglass rudders have T-foils. The obsolete aluminum surface-piercing foils are located at the front cross bar to provide lift. It works.....
So again- when are you going to appear at Lake Santa Fe this fall to fly it? Ya can't spend the whole year on-line.....


Dacarls:
A-class USA 196, USA 21, H18, H16
"Nothing that's any good works by itself. You got to make the damn thing work"- Thomas Edison