Mustang, that's an interesting web site. I have been noticing that many of the WWI airfoils had a decidedly sharp leading edge. This is noticeable on both the th Nieuport and the Pfalz thought neither of these had a supper thin airfoil -- certainly thicker than the EIII. I'm trying to decide whether to go with a 100% scale airfoil or use a modified flat-bottomed airfoil. The scale enthusiast in my knows which way he wants to go but the side of me that actually has to do the building and flying says otherwise!