what height do you prefer to set the nut slots at? is the open string action set higher than the "2nd fret with the 1st fret held action" so the open string won't buzz at all, and also catering for wear? -although this will make fretting athe first fret more difficult. on fretless is the slot set so the strings practically lie on the fingerboard? there's an interview with Percy Jones in which he says he prefers one of his 2 Wals with lower nut slots as the open string buzzes/mwahs.