Dot action: recommended measurements for nut height and relief?

021” when initially shaping the nut by measuring the first fret height, adding 021” to that, and stacking flexible feeler gauges up to that

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

nuts and bolts slot In theory, yes The ideal height would be just about the same as a fret's height in the same position as the nut In practice, I've found that there

nut slot height You want the smallest amount of clearance you can get and still have clearance The idea is that the nut slot height is simply the same height