Nut slot height

nut slot height   Dan nut slot depth

You want the slot depth on the wound strings to be between 50% and 75% of the string diameter, and the unwound strings to be around 75% to 100% of string

Ideally, the string sits in a slot about half the height of the string If the slot is deeper than that, some material can come off the top  John Carruthers shows us the proper way to adjust the nut on a Stratocaster This video is step

slot jack hammer Add the desired string height in relation to the first fret You could take as a guidance Put together so many gauges until you reach this With normal string heights for a steel stringed guitar at the 12th fret , a nut cut to same heights