Guitar Fret Wire

You've not stated the particular method whereby you'd clean out a fret slots with a drill bit, or your particular application Frets tend to be

Japanese Fret Slot Saw; Hosco Brand

fret slot depth In the Koch book it says The fret slots should ideally be of exactly the same width as the fretwire or only marginally

fret slot saw fret slot width So what is the best tang thickness for the frets I was looking at purchasing fret wire that comes in three different tang widths