Nut action -

Ideally, the nut slot height is identical to any other fret But remember that strings can 'saw' themselves through a nut just through normal use I

To allow the strings to clear the top of the first fret, the bottoms of the slots should be 030 higher than the fret height Use your feeler gauges to find

nut slot files To check nut-slot height, hold the string down at the third fret, and see how much it moves over the first fret This is similar to checking

nut slot height If the string is touching the first fret, chances are the slot is tool low Confirmation of this is the string will buzz unfretted but not when