Just call or email Greg he will let you know up front. Guys an expert, monster guitar repair, honestly my guitars feel like they've been touched by a luthier when I get them back - Im at a loss as to where I would go to find service as good as Greg's should I ever move out of the DC area.
Could be a number of things...fret wear, neck adjustment, bridge height, or all of the above...a pro like Greg should be able to sort it out and let you know
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