#2
It looks like putting in posts is at least something you would have to do. Otherwise, never tried one before.
Gear:

Guitars:
BC Rich Warlock
Dean 88
ME682-In Progress
Amps:
Carvin SX300
Etc:
Clayton 1.0mm picks
Planet Waves cables.
#3
This is essentially what I did in my partscaster build. The body obviously previously had a standard six-screw trem on it but I just drilled the post holes and the new trem dropped right in - with a tiny bit of enlarging required on the cavity.