After cutting the walnut fingerboard and sanding it carefully to fit the existing fretboard, I used my 1/100 ruler to mark the fret pattern for a 28″ scale pattern. It’s a very delicate operation so I can’t rush it. I then use my Japanese fret saw to cut the frets.
Once the frets are pressed into position, I must file down the edges flush with the fingerboard.
At this point, I glue the fingerboard to the fretboard using clamps and my homemade jig and let it dry.