Did a final check on fit for the ribs. Scuffed all parts with scotchbrite and washed in Dawn dish soap and warm water. After drying, primed all parts with NAPA 7220 primer.
Riveted the new flanges onto the main ribs. Inserted the ribs and cleco'd together. Several of the holes for the rib flanges were not round from the rivet removal. Drilled up to 5/32 per the SB instructions and all holes were good. Used oversize Cherrymax rivets to rivet the flanges to the spar.
Used the squeezer to set the one skin to front spar rivet left and right on the top and bottom. Also set the rivets to fill the unused skin hole.
Used the squeezer to set the skin to rib rivets on the top and bottom of the stab. Riveted on the nutplates last.