Spline modeling a wing is one of the easiest and fastest ways to make one. You can create a beautiful airfoil in just a few minutes including a nice wing tip. I don't know if there are any tuts on the method, maybe Lionheart has done one since he does work a lot with splines. If there isn't a tut I'll make some screen grabs for you. Just let me know.Interesting method to model a wing. I would love to see end result or entire workflow.