I’ll spare you the sorry tale of how this guitar came to require a new soundboard.
I had to remove the fingerboard and cut off the old one. Awful
process. One tries to be gentle but it’s really messy and may make
repairs of the neck necessary as well. It certainly damages the
finish and ruins the top binding.
Since I’m using regular clamps to do this (violin maker spool clamps
would be ideal but I don’t have any), I use a vacuum fixture to
hold the guitar by its back plate, elevated over the bench. You
can see the vacuum pump and hose in the pictures. I put a
stack of wood with a piece of foam on top to support the
neck in case the vacuum fails or something like that. A guitar
without a soundboard is considerably less rigid than a guitar
with one and holding the guitar out over space by the neck
is just not a smart thing here in my opinion. In building a guitar
the back is usually put on last and for a variety of reasons this
makes more sense.