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Using the Neck Jig
The Erlewine Neck Jig is a string tension simulator. When the
strings are removed, the Neck Jig holds the neck in the same
curvature that existed under string tension.
This eliminates the problem of working on frets, then find-
ing that everything has changed when you s tring the guitar
back up to pitch. The result: fretwork without guesswork!
Quick overview
Jig the body
Begin with strings on the guitar, tuned to pitch.
It’s not necessary to loosen the truss rod or adjust the neck
at this point. Rest the guitar body on the adjustable-height
levelers, and hold it firmly with the body straps while the
neck remains free and untouched.
Tilt to playing position
With the guitar strapped in, turn
the Neck Jig 90 degrees into the same position as when it's
being played.
Adjust the neck
In the playing position with the strings
tuned to pitch, adjust the neck for the work you plan to do.
This usually means straightening the neck.
Zero out the dials
Bring the dial indicators into contact
with the straightened neck, and set the dials to zero. Now,
any change in the neck will be evident in these dials, causing
them to deviate from zero.
Return to horizontal and remove the strings
Tilt the Jig
back into the horizontal working position and remove the
strings. The neck will backbow from the release of string
tension and the pull of the truss rod.
Simulate string tension
Use the peghead jack and the
peghead puller, lifting and pulling to recreate string tension.
This forces the neck back into position as you see the dial
indicators read zero again.
Support the neck
Now raise the neck support rods, bring-
ing them into firm contact with the back of the neck. These
supports keep the neck from flexing during leveling.
Consider replacing the nut:
Most refret jobs require a new
nut. It’s easier to level the frets, or the fretboard, when the
guitar’s nut is out of the way. If you’re planning to replace
the nut, remove when you take the strings off.