(I've done a little research, and I'm sure there are already threads addressing this, but) I'm about to start a full-custom build, and I'm wanting something equivalent in functionality to a standard Floyd rose set-up, but substituting a locking-nut for with locking tuners (sperzels?), and a nice graphite or some-such nut (with lubrication). Govan's Charvel set-up is close to what I'm after, but I'd like fine-tuners at bridge. It may be wishful thinking, but the point is a setup that can tolerably handle heavy Vai-style usage (minus drastic divebombs), but also behind the nut bends and quick (drop-D) tunings when a tremol-no's engaged. So, what would be your suggestions be for the best possible set-up, with that in mind?