Re: What should I know about tremolos?
Glad things go so sweet in your world, GT, but here on Earth, strings stretch even after locking if you don't stretch beforehand. :friday:
GuitarStv, since you're looking at Satch/Vai type stuff (pullups and such), you'll definitely want a double-locking i.e. Floyd Rose system.
I've never noticed a difference in useable sustain between two identical guitars (same model, one with and the other without a trem). A bad setup on a Les Paul will kill sustain whereas a good setup on a cheapass Hondo with a double-locking trem will have better sustain.
Also I've only broken strings on non-tremmed guitars, and they were less than a week old, and broke at the nut (a graphite nut at that). Not at the bridge, not at the tuner where you'd expect a sharp edge in the post, but across the graphite nut. Twilight Zone.
I've used crusty, year-old strings on a Floyded guitar that sounded like total ass and felt like bad feet (or vice-versa), and never broke one when shaking the bar like a screaming baby.
However, yes, a heavy hand will push it out of tune. As well, you have to go extra deep for bent notes since the bridge will tilt forward as you manually bend the strings (fretting hand), thus reducing the overall pitch. Usually it's only half of a half-step or less.
They do make tremstops that prevent the guitar from pulling up with a string breaks, but you can manually pull the trem back. Never used one, though.
Another important note is that proper technique with a Floyd is an art unto itself. It's really easy to go too far either way, and those "shimmering jazz chords" will come out as a sickly warbling mess. Kahler trems are a lot smoother (particularly the studmounted version you see on old 80's Gibsons) but they also use a locking nut that is installed behind the regular non-locking nut, which defeats the purpose IMO. You can pair a Kahler trem with a Floyd nut, though.
As well, the studmount and flatmount (Strats and such) don't really allow for pullups as they're usually set up for dive-only. There should be a set screw on them you can adjust to let the strings pull it forward a tad to give you some pullup room, but another issue is that those trems use cups instead of locking saddles, so you can dive too deep and pop the ball end out of the cup.