This is what will, or can happen when a truss rod is over-tightened. Also, snapping the rod itself,
stripping the nut or rods threads, etc. are all probable. The truss rod exerts enough pressure to separate the fretboard from the neck. This was a unique situation where the fretboard material
used was not wood, so choosing the right glue was (as always) critical.
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Remember, careful with those truss rods !
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