I finished cutting the strap to length then I marked the two slots. Using my bandsaw I cut out the two slots and then used a sanding drum in the drill press to clean up the ends of each slot. Next I used the vixen file to cleanup the slots. I sanded the slots using a piece of 220 grit aluminum oxide sandpaper wrapped around a 1/2 inch drive socket extension. I finished the part with scotch brite and then started to layout the pilot hole locations.