Im post 17 there in the photo is a hole punch for the bolt holes he uses for clamping his ribs together. I have a bunmdle of those I made up using light guage stainless, both rounds and in square and rectangular sections, which I use for notching out for spars etc I use 5/16 threaded rods, both for shaping and for my wing jig, which will take up to a 66" wing easily, and I have made a rib clamp using the same hole spacing as the jig, I prefer to cut marginally oversize and use my bar to finish my ribs, and mark out all my spars while clamped, and it takes no time to punch the notches etc