Fret slots are deeper than fret tangs? : rLuthier

However, the calculator will report the disance as This is inconsequential, as nobody can saw a fret slot that

StewMac sells a fret slot depth gauge, but you can also make one yourself with a razor blade or sheet metal stock (Mark Fogleman's suggested

fret slot depth If you think it's necessary to radius your fret slots so they'll match the radius of your fretboard

fret slot width Based on the rumor that Polymet makes their fret wire I found that all but two SM options have an identical Polymet match and their tang width