The fuselages last bulkhead in the tail is F-712. It holds the tail tiedown and will be an attachment point for the vertical stabilizer (rear main spar attaches to the bulkhead in pic 2 - flush rivets required). The rudder will swing behind this. Pic 3 shows the tie down cut, tapped (3/16" X 16) deburred, primed, riveted. Leave the holes free as shown - the vertical tail spar will bolts to those holes - later to be enlarged). Next will be the dreaded fuse longeron angles to be bent to a pattern, then the fun part - start assembling the aft fuselage.
