Just a warning about Grover Stat-Tites...the new or "modern" ones are not bad at all, as used on the first series of Guild GAD guitars...but I remember hearing complaints about them and came upon a NOS set that must have been pretty old...yeah, not good like in 1966 Audition electric guitar (Japan) not good.
If you go with Sta-Tites, just make sure they are new new...