I consulted with Michael Selig at UIUC, got an airfoil from their database there.
Hotwired my own foam cores, bonded them to the struts, layed up a couple
layers of glasscloth, and spent eons sanding and filling, and they look great!

My plane goes exactly the same speed as all the other IO-240B engined
kitfoxes ... So I guess they work well enough ...

Would I do it again ...? Probably not. I hate sanding and filling glass.

Regards,
Jeff