Re: Intonation Problem
If the string gauges are kept the same, and are of same alloy, and tuned the the same referrence, then once intonation is set, it need not be set again ...
I've checked many guitars that have the same setup, and they scope true each time between string changes, very rarely, but seasonal still, do they tend to drift. Of course Ryan you know about set up floating trems, so I won't mention the stabilization issues. Only thing that comes to mind is the old strat-itis issue, although more of a problem with single coil rod mags, it might be possible that a HB too close may cause the same thing (especially if you get something like an X2N to close to the strings). It either register sharp, or fluctuates the reading. On a personal note, I don't put much stock in the strobe deal, a TU-12H is accurate to within +/- 1 cent, and your ear can't detect a musical difference, certainly less than what equal temperment imparts. Grinding and polishing frets (especially ever two weeks ... man some tech is milking someone with a wallet vacuum job), I've seen guitars that haven't had a fret level in decades intonate just fine ... especially referrenced to just one fret (ala 12th in this case). The only other option that I see, is the fact that perhaps the bridge was not installed correctly per factory (I doubt this) ... Ryan have you tried (as odd as this sounds) replacing that one 46 with another? One option might be to start with a fresh string and with the sadddle all the way back first, and then bring it forward as needed, as the can eliminate the chance of any deformation of the string over the break angle of the saddle. Man, that's just to odd ... and bridge is fine? String height and neck angle fine? I don't know, I'm out of ideas Ryan.