I've got an Ibanez RG752AHMNGB that I bought a few months ago with a super buzzy 7th string in drop A (64 gauge on low A). Raising the action helps a bit but makes it impossible to intonate the low A (super sharp even with the saddle all the way back). I've been trying to add some relief to my neck but it seems to be stuck at about .5-1mm when measuring with capo at first fret and holding string down at the last fret. I've loosened the truss rod nut to the point where it felt completely loose so I'm not quite sure what to do at this point. the other strings are fine in terms of buzzing and the 7th is fine if I tune up to B standard, but I like to play in drop tunings so this is in addition to the bad intonation is kind of making me quite disappointed with this guitar given the price paid. If anyone has any suggestions let me know.