I'm also well into the wing build. The ribs I have are tabbed, so to take advantage of them, I'm building the front half of the wing first. I then plan to cut the tabs and rock the wing back onto the rear sheeting. (In the picture below, the stack of wood on the rear is just resting there.)

Of course, the rear sheeting needs to wait until after I finish the entire length of the front of the wing. In order to get everything to line up right, I will need the tabs when I prop up the first side by 3 degrees to build the second side. This all seems to work fine so far. It was no problem slipping the ribs in between the top and bottom spars for the second half.

I decided to glue those plywood rib halves into the center anyway. Even if I go with two pins, I can just glue them to the outside of these plywood pieces instead of between them.

I noticed in the scratch builders thread that there was some confusion as to whether the front stringers (or secondary spars?) should be hardwood or balsa. I remember when I reviewed the plans to order the stick wood that somewhere it clearly said hardwood for those. However, now I can't find where?

Finally, the wing looked a little on the light side strength-wise, so I decided to do spar webbing out through the 3rd most outside rib bay. I was suprised to see the exact same solution on the other build thread. (His went all the way to the end though.) I went back to check the plans to see if it was called for there, but I didn't see any mention of it. Anyway, glad I decided to do it now!