RE: Building a built-up pattern stab and wing
Dave, the Int wing snaps pretty well despite being ridiculously heavy....I can't tell that the Xigris airfoil is significanly better. I'm pretty sure that a light Int wing will be every bit as good as the Xigris. In fact I'm starting to think that the thicker wing is what we want for P13. I find the heavy Int easier to manage speed during P13 than the signifcantly lighter Xigris....I believe the wing is the main reason as I can't really find other sources of drag between these two designs.
A direct/reverse Engineered Int wing will allow 'drop in' to old Int with few to no changes.
If there is anything I can do to help encourage you in that direction just let me know.
Colin.