I am in the process of refurbishing a Gulbransen player with a glued
stack.  Since I don't have the facility to saw the stack apart, what
is the best way to break the glue joint?  Or is sawing it the only
way?  I thought about just keep soaking the glue joint with vinegar
and/or heat.

Duaine Hechler
http://www.hechlerpianoandorgan.com/