I provide precision guitar and bass setups (true fret leveling +/- .001″, nut slot and bridge adjustments, etc). ‘True’ means every fret is the same height across each fret length only made possible by matching the fret radius to the fretboard radius. If not true, the frets will not be level and this in turn degrades play and intonation. The biggest benefit of having true level frets is that it will allow the lowest buzz free action without or perhaps with absolute minimal neck relief. Crystal clear intonation, bell tone vibrance, deepest easiest bends, and sustain for days even on guitars not recognized for sustain dominance.