Craig, I recently ran into one of those 1% of pianos in which the bass
bridge is still firmly glued to the soundboard yet has to be replaced
because of a 'zipper' crack along the bridge pins.  This particular
bridge is not cantilevered - it mounts directly on the soundboard in
4 locations (it has arched reliefs inbetween the glued on areas.  I have
removed the screws and have tried a little vinegar in water solution
applied to the joint with no positive results.  Any ideas on how to go
about this without damaging the soundboard?