Bought this for a home built and I must say this is a disspointing product. The vibrato action is very stiff and often catches on itself causing tuning issues. Its difficult to find units like this but I would recommend you keep looking or buy F product, this was a waste of money!
In terms of aesthetics it looks right and the chrome is well done, it is a good looking piece of kit and if you just want something to hold strings in place this is fine.
The screw positions are all vintage correct so this will drop into any big F or little S guitar with no modifications