Re: Intonnating a fresh Floyd
Rough in the intonation pattern, while you've got the bridge still loose. Move the claw out a good bit, then put the floyd on the studs and catch it with a single spring, so the bridge doesn't fall out and possibly make a mess. Find a way to support the bridge in neutral position - most often I use a piece of cork or rubber under the whale tail; other guys take a couple of coins, wrap them in masking tape and shove them between the sustain block and cavity wall, some guys use gimmicks like tremstops, backstops, arming adjusters, tremolnos and whatnot. Put the strings on, winding the slack onto the tuners. Now make sure you've installed enough springs before you start tuning, duh! You can pull the claw back in a bit as well.
Tune the strings to pitch. Once they are stretched and in tune, check the intonation in the usual spots (12th, 24th, 19th frets and harmonics). Watch the tuner and note how far off you are and in which direction. Now loosen the string, unscrew the saddle from the baseplate, and correct the string length (you'll get a feel for it once you've done it a couple of times). Reattach the saddle, retune the string to pitch, check the intonation again. Repeat until all the strings are intonated. If you're running your floyd full-floating, set up your spring tension, moving the claw until the cork just becomes free. Sniff the cork (optional).