With all the frets installed the final step is leveling and crowning. I use a metal leveling bar with self adhesive sandpaper to level the tops of the frets. I sand until all of the top show sanding marks being sure to preserve the radius of the frets.
For crowning I used diamond crowning files and clean up the filing marks with sandpaper and steel wool. (I didn’t take pictures at this stage, I’ll have to add some later from other jobs.)
Since the string slots in the old nut were now too low for the new taller frets I made a new bone nut.