Today I started working on the practice airfoil. The kit came from Vans but there were not any instructions. I called and had them email the instructions but still no drawings. I decided to just put it together as best I could to get some practice with all the various methods. I used the outer ribs to get the angle I needed to cut the stiffners. I looked at some photos of others who have worked on the kit and realized the ribs were oriented wrong, so I turned them around as you can see in the last photo.