Nowhere in the plans does it show that the outboard seat ribs get drilled for nutplates, but they obviously need them so the front seat pan can be screwed into them like every other rib. I grabbed my nutplate jig and drilled the rivet holes, then dimpled and riveted on the nutplates. The plans mention that nutplates right next to the side skin are hard to get a screwdriver on, so it suggests running a tap through each nutplate to make the screws go in easier. This isn't normally kosher to do because it removes the self locking shape of the nutplate, but for a small percentage of screws in a seat pan, apparently it's no big deal. After these ribs were finished, I went ahead and set up the passenger side seat belt mount, so I'm ready to finish that as soon as the right angle drill bits arrive.
