I just got a new guitar and it seems slightly back bowed even though the truss rod is loose. Should I tighten the strings a half tone or a full tone for a few days to get a little more relief or would this be futile? The guitar is an MIJ Ibanez Prestige. The truss rod has been loose for a couple of days now and I haven't noticed any increase in relief. I want to lower the action but I get fret buzz at around the 8th fret. It is my understanding that with a little more relief, the 4th-6th frets will buzz and that is the ultimate relief setting. (After that relief is achieved the saddle should be raised so that the strings don't buzz anywhere.) The action now is good and acceptable but a little lower would be better.