My 2004 Carvin walnut 6 has been a very stable and consistent friend. I don’t play as much these days but still enough. I pulled it out today and it had a terrible buzz on the 3rd fret of the g and c string( c is a lot worse). Loosened the truss rod and even raised the bridge saddles a little bit but it didint make a difference. Never had this problem. Seems really odd it’s only at one place on the fretboard. Any ideas?