Intonation starts with proper guitar neck design (fret placement, nut setup, bridge setup and adjustment, action, neck relief), correct string installation, correct tuning. I learned the Johnny Smith method from my guitar teacher in college and have been using it ever since. Sorry to post links to another forum, it is the only place I found a reprint to the article written by Johnny. He had to have an accurate tuning and intonation system as he was playing with orchestras, etc., in New York in the 40s and 50s.
The Johnny Smith Stringing & Tuning Method | MarkWeinGuitarLessons.com
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