John, cousin, came in from PA today and joined me in the garage for some airplane building. We continued work on the pilot seat.
We moved the pilot seat to the fore most position. This allowed us to use a drill bit that just fit inside of the square hole in the seat rails to mark the rear blind nut positions.
We then removed the seat, drilled out the rear holes, blind nuts and rivets that go along the rear seat support.
After this was all done, debur and re-installed the pilot seat. It works!