I started out by unclecoing the rear spar and taking it over to the drill press so that I could ream the wing attach bolt hole to its final size. Then I re-clecoed the rear spar back onto the wing and installed all of the rivets that hold the rear spar to the wing ribs. I chose to put the rivet factory heads on the external side of the spar (even though the ribs would be the thinner material), since that would simplify drilling out that rear spar in the future if it ever needed to be done during damage repairs. There are still a few clecos holding the section where the aileron hinge bracket would go, but I am waiting for some longer rivets to be delivered before I finish that part.
The next section relates to installing the top wing skins, so I started by retrieving those two pieces of sheet aluminum and the two wingwalk doubler plates from the garage and clecoing them into place. This really made the wing start to feel like something solid since it adds a lot of structural rigidity to the ribs. Then I match drilled a few places where nutplates would need to be installed along the inboard edge of the wing, and final drilled a few other places in the wingwalk doublers.