Then I took a look at the bolts that would hold the bocote blade guide blocks to the backer block, and saw that they were all too long. So I made a little jig to hold them so I could cut them all to the same length. I used the calipers to have them stick out of the maple block a consistent amount, and I cut them off flush with the maple block.
Then I drove them a couple turns deeper into the block so the cut end would stick out a little bit, and I filed the cut smooth.
Meanwhile, I prepared these backer blocks for the t-nuts by drilling holes, including 3/4 inch counter sink holes and and little holes for the prongs that hold the t-nuts in place. I also drilled two holes in the center for the drywall screws that will hold this backer block to the even larger block that will mount this thing to the guide block arm.
