Thanks Dan and B, Yeah I figured that getting both good 3D and smooth aerobatic performance from one airfoil would be tricky. The smooth aerobatic performance doesn't have to be to f3a standard, I was more looking for relatively smooth flight characteristics, nothing to special. I will look at the NACA 0012 and Selig 8022 as they seem to be just what I'm looking for. I will measure the taper ratio on my friends sebart katana 30E and will use something similar to that. I plan to inlay the wing with layers on carbon tow to create a spar, also I'll skin the surface with a light weight glass cloth to help keep the wing nice and stiff.

Thanks
Michael