A good program for foils and designing wings is CompuFoil3D, you can print templates for your star insertions, I have used it for several years now, make designing a wing so much simpler. The structure; spars, LE and TE are not the problem, it is the ribs and putting in all the lightening hole and stringer notches that on a big wing takes day. It is done in a matter of a couple of hours!