Hey guys, not so nice surprise tonight, my SE C24 has developed a very specific buzz. It is on the G string only. When I play the 4 fret, it starts to appear, 5th fret is about the same. 6th fret is buzzing happily. 7th is neat. I am out of sunlight so not best conditions but at first sight there is nothing obviously wrong with either 6th or 7th fret. Any thoughts on where it could be coming from and how I get rid of this? I'll try to take close up photos of the fret at the weekend.