By the way, the reason the height of the nut slots effects intonation is because, that close to the nut, when you push down on the string, if the nut slots are too high, you are stretching the string more than if it was set right, and it can cause problems up to the third or fourth fret. Not everyone can hear it (hell, some people have never noticed that their `70's Martin's are can't play in tune), but many can (I sure can). It drives me nuts when they are wrong, because I play chords all over the neck, and if I get the open chords in tune, the higher position chords are fucked up.
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