I am building one now, but my cancer thing kinda has gotten in the way. I converted mine to a B model to give it a touch more scale look. The airfoil looks to be the same as a Saturn, or very close. I built the wing in a lost foam fixture which was made of 4 parts. Since the wing has the scale "cuffs" in the center, those sections were made separate then joined to build the wing.
Bob started the design many years ago ('98-'99 ??) now, but gave it up for whatever reason.
I am looking forward to getting mine finished and back to flying before next year. Just having problems with neuropathy in my hands, feet and legs.
BIG Bear
RNMM/AMM