RE: Goldberg Ultimate 10-300 build
the great planes .60 extra 300 uses a built up aileron. 1/16" sheeting top and bottom, about a 3/8" square balsa leading edge and ribs about evry 2". if laminated on a flat surface, they are straight and flat, strong and very light compared to solid stock, and built to exactly the proper size. not hard to build, granted a little extra time w/4 ailerons, but worthwhile.
jon b