Finished riveting the aft ribs to the LH main spar. Used a squeezer to attach the second and third most outboard ribs (the outboard one doesn't get attached to the main spar yet) because the rivets were all accessible through lightning holes. Riveted on the aft spar using a squeezer for all rivets. Some holes that are common to components that haven't been installed yet were left open per the manual and plans.
