I recently bought a used JTV-69 from a studio that used it for 1 session (great deal). Took it to my tech for a setup and I noticed my g string sounds dull. Doesn't ring clear like the rest. Doesn't appear to be a nut issue as the fretted notes do it too. Also, sounds dull without being plugged in. Changed strings twice..tried 010's and 009's. Anyone out there have this issue? Maybe a saddle issue?