So my V7 has developed an annoying rattle/buzz behind the nut and I'm not sure what the most likely culprit is. It seems to be related to the A string, but I've made sure it's secure on the tuning peg, and the string tree pulls it down at a decent angle over the nut. So could it be the tuner? The tree? The nut? The problem seems to disappear when I press the A string behind the nut but if it is that what could I do about it without having to resort to take it for repairs, which is economically unviable at the moment? As you can hear from the video the buzz also appears when plucking the open D and G strings, but not the E.
Any suggestions gratefully received!