I speak heresy here, but this is the twistin' truth as revealed to me in more than 40 years of playin' guitar:

Exact intonation is not only unimportant, it is impossible.

Don't worry about it.

This is what my Gretsch G6128TCG Duo Jet looked like when I first got it:



I can't see much of it when I'm playing, but I can definitely hear the difference. And that POS bridge that was factory installed is never gonna be put back on my guitar for as long as I wanna play it! Tone is now amazing; chords sound right anywhere on the neck, and sustain is now better than I really need.