I have an Epi ES 339 I got maybe 4 years ago, and the intonation has never been quite right on the G string. The original bridge is 11.4 mm by my electronic caliper. As you can see with the pic below, I had the G saddle all the way back and flipped it around, and the 12 fret was still a tiny bit sharp. So I got a new, wider bridge (14.2mm by my measure). Problem solved, right? Well, you can't turn these saddles around, so I'm still in the same spot- G stringsaddle all the way back, 12 fret still a tiny bit sharp. See below: Also, and I didn't notice this before, but it looks like the bridge is not parallel with the stop piece. Maybe an optical illusion, but it looks like the string length is slightly shorter on the treble side: I used the posts that came with the new bridge, and it doesn't seem loose on the posts or anything. Weird. Any thoughts? It's really close, and once the drummer hits the crash cymbal it probably doesnt matter much, but I know, and it drives me a bit crazy. Thoughts? The action's low, so I could raise it (thinking that might extend the scale length a bit?). Anything else to try?