FretMaestro Tutorials
Part Four: Guitar Setup

Part One: Prepare

3rd Party Tools.
Fret Forensics - Knowledge is power.

Part Two: Maestro Technique

The Files.
Holding and using FretMaestro.

Part Three: Finer Points

Save time, save fret material.
Ultra Precision Finesse

Part Four: Guitar Setup

Nut Slots, Saddle/String Action,
and happily skip neck relief.

Part Four: Guitar Setup:

Nut Slots:

Whenever frets are leveled they are made shorter than before. This then means having to adjust the nut slots.

Now for the first time you have True Level Frets matching the radius of the fretboard, so now measuring from the fret crowns to achieve true accurate nut slot height all across the strings is actually real.

Nut Slots: Come before Saddle/String Action - the height of the slots is determined by the top of the fret crown. The ideal all around slots:
Six String:
Low E & A: 0.02"
D & G:  0.018"
B & High E:  0.016"
Bass:
Low E & G: 0.02"
A & B:  0.018"

Easiest tool for measuring references top of frets, not the old and crude hit and miss feeler gauge way.

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Saddle / String Action:

Whenever frets are leveled they are made shorter than before. This then means having to adjust the saddle/string action.

Now for the first time you have True Level Frets that change the old rules for the setup. There is no longer the need to compensate for ballpark level frets using higher action and neck relief.

The neck must be flat:
Electric guitars are forgiving because the adjustment is by screws Vs sanding a saddle.
So... aim for low action if this suits your style of play.

Acoustic Guitar are not forgiving, once the saddle is sanded there is no going back.

Following ridiculously high action specs because before FretMaestro there was no way to achieve True Level Frets:

  • Low Action: .047" / .079" (1.2mm – 2.0mm)
  • Medium Action: .094" - .11" (2.4mm – 2.8mm) — considered the "standard" range.
  • High Action: .078" and above. 

Following action specs based True Level Frets:

  • Low Action: .04" / .06"
  • Medium Action: .05" / .07"
  • High Action: .08" and above.

More details in the video:

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Neck Relief Myth:

They say neck relief is to extend room between frets and strings to allow for the oval vibration of the strings, so they do not hit the frets.

This is both true and false.

True:
Because with their archaic 19th century tools and methods for leveling frets it is literally impossible to achieve True Level Frets. They compensate for this by hiding their wonky frets with higher string action and neck relief.

False:
Because their excuse for true is nonsense. Guitars are engineered/designed to have flat fretboards on length, the scale length is based on the neck being flat, not warped in relief that shortens the scale length.
Intonation is warped as well with neck relief because it cheats the action by bending the headstock upward.

When the frets are in True Level, level from fret to fret, every fret the same height from the fretboard and every fret radius matching the fretboard radius which is the only possible way frets can be level in any direction, then neck relief is rarely needed to cheat the setup, and the result is smoother faster lighter action play, easy deep bends without fretting out, clear intonation, notes that sing, and sustain for days.
You don't believe this because you have never had True Level Frets, you have no honest reference point. Because there is only one tool on Earth that makes Precision True Level Frets possible, FretMaestro. There is nothing, absolutely nothing that compares, there is no substitute.

More details in the video:

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Other tools required to complete the ultimate Guitar and Bass Setup: SixStringers and 3rd Party:
SixStringers has no affiliation with 3rd party sellers, we only want to save you time finding the best quality deals.

Guitar Neck Support: 3rd party

This is the only one I recommend because it is the only one that self-adjust to balance and establish a rock solid support and also does not extend above the fretboard to obstruct work access.

Notched Straight Edge: 3rd party

You want a notched straight edge that stands up by itself on the fretboard. Expensive triangle and sculpted ones look pretty but they fall over meaning you must hold on... not good. And the cheap ones are not actually straight.
We recommend this Made in USA company, mid-range price, top notch quality.

SixStringers Saddle and Nut Sander:

For acoustic guitar sanding the saddle after fret level is a must.
SixStringers makes the only True Precision tools for the job.

String Action Gauge: 3rd party

After true leveling the frets and then dialing in the nut slots the next step is setting string action, and a good gauge is an absolute must have. See link for 3rd party highly rated fair price gauge.
There are very expensive ones, and very cheap ones, price either way does not mean accuracy. Here are two we like.

SixStringers Nut Slot Gauge:

Nut slots are a real bear to get right, mostly because the traditional measuring tools are hit and miss 19th century relics.
SixStringers Nut Slot Gauge is super easy to use and dead accurate.
Insert gauge blade into nut slot, retract the blade, when you hear and/or feel a click or drop, the slot is too shallow. File a bit at a time, checking as you go. When the blade slides out without a click or drop the depth is right.

Nut Slot Files:

Nut slots almost always need adjusting after fret level.

Nut Slot Files need to feature a half round cutting edge for proper string seating.

Nut slots should never be more than .003" wider than the string gauge, ideally no more than .002"

Music Nomad files claim .01" for 1st string, but measure the ends of their .01" file, it is .013", then measure the full length of the file on the diamond, it is .015" to .017" because their file is warped. Numbers don't lie, dishonest companies do.

StewMac prices $480 for 6 files, get a life.

Then the budget round files - the smallest is 0.02" far too big for .0085" to .017" strings.

I cannot in good conscience recommend any of these nut slot files, all are off by the numbers.
Which is why...
SixStringers is developing True Precision nut slot files, stay tuned.

Amended: These files are not long lasting because serrated Stainless is not recommended for nut slots, that said, for the price and selection these should get the job done on at least several nuts.