a month ago i bought a used RG7420, the condition seemed perfect although the guitar is 16 years old. I assume frets are new since they show very little sign of usage. Now i've been dealing with the guitar for 2 weeks or so, i shimmed the neck with 2mm of thick paper (through all 4 screws) beecause the actions was 3mm high even with the bridge at it's lowest. I changed the pickups to blackouts, oiled the neck and everything, so the guitar would have optimal playability. But a problem occured - there is a very annoying fret buzz at the highest frets (15-). The frets seem level with each other, and the 24th fret of the 1st string suffers a terrible sustain loss, which is very weird for the last fret. The action (24th fret of 1st string) is a bit less than 2mm, which i think is high enough, and the fret buzz does not disappear even with action of 3mm. But the problem is really persistant just with the higher frets of the higher strings. The truss rod cannot be adjusted (it's stiff and i do not wanna crack it). What would be the next logical step in order to get rid of the fret buzz? I won't higher the action because even very high action causes fret buzz and i do not expect to have a 3mm action on an Ibby. Maybe it was because I shimmed my neck with 2mm equally on the whole neck pocket, and thus lifting the neck. Was that wrong? Any suggestions?
Last edited by M.V; 09-04-2016 at 04:17 PM.