To start off, I had to work with a really crappy set of wings. Dirty, already started 30 years ago etc, etc. With the new directions came more enthusiasm. On the wings, you have to remove some of the foam on the inside of the wheel wells so the retract well and retracts will fit. The original owners did this but didn't take out enough foam then they glassed over them. After 30 years, all of the finishing epoxy turned dark brown and very brittle. I had to take a dremel tool and take more out. This is just the start of this nightmare lol!
you can see the instruction booklet I made in the left corner of the pic here. This pic shows the wings at the start. The spar is also installed in this picture.