my vanity is not so great that it needs to have my initials on it.... i dont do the john birch thing, he occasionaly modified gibsons and put his own logo on them. ok, some were heavy mods like new necks but there was also some less major mods that ended up with his logo.
anyway, definately not on the front of the body as i think it will distract from the blue. potentially on the scratchplate in a firebird style, possibly on the back behind the neck plate or ferrules. maybe just a pencil scribble in the cavitiy