Is it possible to put a B7 on a stock SG that currently has a stop bar tailpiece? Would there be issues with the old post holes? Cause it seems like one of the mounting screws for the Bigsby would line up and a little TOO well with the old post holes and give you nothing but empty space to drill into.
And also would it be basically visually covered by the unit? If this is the case I would just fill it with some red stained wood filler and figure the other three mounting screws going into solid wood would be adequate for a solid body guitar.