Gorgeous pickguard! Can I ask where you nabbed it?LOTS of ways to go about this, but I'll try to keep it short:
-Get a USA B5, better for upgrades and replacement parts. Not B50, B500, but the original USA sand-cast or Allparts version.
-RomanS is spot on about the tension bar, you want to have a decreased break angle, which is counterintuitive but best for tuning stability and 'feel'. That said, "medium" break isn't too bad either, which is where I am, I think.
-Consider Callaham's upgrades, I've gone that route and am very satisfied. I drilled out my stock bar myself though, because I have the drill press and machining experience. It's still narrow string spacing but doesn't matter with the Callaham grooved roller.
-A slotted saddle is best, less important if you get the grooved tension roller bar. I'm using Glendale Groovies right now, but a creak I can't get rid of on the B/E saddle has led me to pull the trigger on a Mastery M4.1. COMING SOON.
-Intonation can be set easily if you mod appropriately. I made a jig to cut slots on the opposed side of the intonation screws. Works like a charm.
Finally, tighten that handle down for no slack. I used some bronze bushings on the handle screw to keep friction low, and use a Reverend soft spring. Everything that moves, all of it including the touching saddles and intonation screw heads get a drop or two of Tri-flow. Exception was the bearings, which are already lubricated. Smoooooooth...
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And excellent advice. Thanks for taking the time to write that all out.