Built up the number 5 bulkhead. Transfered drilled most of the holes. Still need to get a .5 ream for the trim tube bushings and I am going to use an adjustable ream on the bolt holes. Book call for a tight fit. The book has you rivet the bulkhead together first. I decided not to do that because I am priming everthing, but I had to move the clecos to the inside of the bulkhead to get them out of the way when building it up.