Found all the parts for step 1 on the F-705 bulkhead. F-705B is fabricated out of a long piece of bar stock that you have to cut off to a very precise 45 3/32" I cut it on my band saw to 45 1/8 and called it good. I'll easily lose 1/32" when I dress the saw marks out of the end. You also have to trim about 1/4" off the outbd ends of the F-605B spar doublers. There are a couple of tiny spacers that go between the F-705B and the F-605B where they start to open up, and they give you a piece of aluminum bar that's all of about 2" long to fabricate this out of. Print specifically calls out to rip this longways for grain orientation, to a finished dimension of 1.5" by .5". Manage to do this on my band saw without any drama by using a piece of angle for a rip fence and making a couple of push sticks out of popsicle sticks. Once all of the pieces were trimmed, I drew centerlines on everything and back drilled all the #30 rivet holes, then called it a night.