Re: Strap Lock
He meant Dunlop or Schaller locks. Both are nice... the Dunlops can be recessed because they lock by inserting a pin into the button. Makes for a nice classy look but is tough to do on the upper horn. Also requires a 25/64" hole with countersink in your guitar. They were not designed to be recessed, but it can be done.
The Schallers are going to be the easiest replacement to a Fender Strat. It's simply a matter of unscrewing the old bottons and screwing in the new buttons using the same scerw holes.