#2
There's no such thing as a 'floating' bridge; 'floating' is about how the bridge is set up. A regular Stratocaster vibrato (vibrato, not tremolo; tremolo is something you do with volume ) bridge can be made to float. All it means is the spring tension has been lowered so the strings pull the bridge forwards, giving some room behind the bridge for it to be pushed back, raising the pitch. In fact, this is how Fender advises people to set up their bridges and all American-made Fender Stratocasters are set up with a 'floating' bridge.

A 2-stud bridge like that Wilkinson one or the current Fender American bridge is a little better for this simply because mounting on 2 studs gives less friction than being mounted with 6 screws. That means if you want to do lots of diving and pulling up on the bridge, these may stay in tune a little better. The reality is though that there's no real difference. A 6-screw bridge can be set up to 'float' just as well, it's just a little bit easier to set the 2-stud bridges up for it.

Bear in mind that no matter what style of bridge you use, there's only so far these can dive/raise before they either run out of space or simply go right out of tune. To keep a Strat in tune with a floating bridge you need to either use a double locking style of bridge (e.g. Floyd Rose) or you need to use a high quality steel bridge (whether it's studs or screws), a roller nut and preferably locking tuners.
Yes, I know everything. No, I can't play worth a damn.
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