My guitar fretboard slotting jig is one of the most popular jigs that I teach new guitar makers to build. You can spend a lot on a fret slotting system, but you can also make a jig yourself that can be nearly free if you use scraps. This fret slotting jig makes exact copies of existing fretboards without needing to measure at all. It's fast, easy, and I have been using the same jig in my shop for over a decade. Enjoy the post, and happy building.