well I happen to own a Granada acoustic that I’ve had for some time now, over a year. Of late I peered down,across the fretboard and noticed that the string height is not the same across the length of the fretboard. Well I never bothered to check when I bought the guitar but I remember the guy at furtado’s pointing to the inner part of the sound hole , to a hex nut , telling me that was the truss road and that the neck wouldn’t bow. Well I don’t know about the neck bowing but something’s wrong. . Or is it? Is it normal for the string height to be different on an acoustic? As for the open harmonic on the 12th fret, well they sound pretty much identical to the fretted 12th note, but the position seems to be little off the 12th fret, of the harmonic that is. It happens to be a little more towards the bridge. can this be fixed by adjusting the truss rod and how do it do it? i;ve looked up some stuff online but the pics there happen to portray only electrics where the nut in at the headstock. Also I’ve mixed some of the strings on the thing, combining a few heavier strings with lighter ones on the higher ones. Also I use a string rated for the 2nd(ie b) on the high e. it hasn’t broken till now. The reason for this muddle is that I haven’t been string shopping in a while now and can’t stop playing till then. But I doubt that the string issue is the real reason. Any ideas/?