Details, details. I forgot to drill one hole in the center of the bulkhead so I had to reassemble to position the hole in the center rib. Drilled the holes to mount the nutplates where the seat belt anchors come through. Fabricated the wear blocks, and cut the bulkhead slots. Fabricated the square washers for the wear plates. Prime parts, and assemble. Mounted it all in the fuselage, looks good.