Interesting you mention that. My son-in-law stumbled across that same program recently and I downloaded it this weekend. One of my biggest issue with the plan for this plane was how the wing ribs were stacked and did not line up. Some of the lines on the odd ribs cross over and you have to be creative when cutting the templates.

How do you know what the airfoil is of the Duellist or any wing for that matter?

We better be carefull with this thread it is straying into the "Twin and mutli" or "Scratch Building" forums!! [sm=red_smile.gif]

I didn't get to play with Profili enough to get as far as you did but would be more inclined to build another with a better set of rib templates to work with.