I am curious about the use of plain white glue for repairing/rebuilding
player pianos.  What are the pros and cons of using regular white glue
instead of hot hide glue and some of the other glues that have been
mentioned here?  Is it used nowadays, and if so, how does it hold up
compared to hot hide glue, et cetera?

Thanks,  John Del Carlo

 [ Briefly, white glue is permanent -- yes, it 'holds up well' --
 [ and so joints cannot reliably be separated again without damage.
 [ Conversely, surfaces joined with hot hide glue are safely separated
 [ with a little applied heat, and at normal temperature the surfaces
 [ remain securely joined even after hundreds of hours of severe
 [ musical vibration.  That's one reason why violins and guitars and
 [ player pianos are glued with hot hide glue (mostly): so that they
 [ can be taken apart for repairs yet won't flex during playing.  You
 [ are welcome to use white glue and other permanent adhesives if you
 [ wish, but you will incur the wrath of the next rebuilder!  See also
 [ http://mmd.foxtail.com/Archives/Digests/200008/2000.08.26.11.html
 [ -- Robbie