[redir]

I never could use feeler gauges. I find them cumbersome and awkward and I feel that for all the accuracy of the gauges themselves human factors renders that accuracy mute... Or at least for this human factor anyway... I use a pencil cut in half that is used as a straight edge across the first several frets to mark a line on the nut at fret height. I find that the line works real well to very quickly get the fret slots to a point where they then need delicate and delibrate file strokes to go slightly below the line till every thing is perfect.