So I've taken to starting to do my own setups. Adjusted the neck relief on my ES-333 and SG. That went fine. Intonation on the 333 also went fine (and man is it way more playable now that I adjusted the relief after moving up two string gauges). One problem I've confronted is the G string intonation on the SG. The fretted octave was sharp so I backed off the saddle away from the neck. Kept testing and still sharp. Now it's as far as it will go and still sharp. All the other strings are fine. Advice? Is it a nut problem? The tailpiece height?