There is a time and a place for all glues.  I have used white
carpenter's glue, then yellow carpenter's glue (Tight Bond) called
aliphatic resin for all wood to wood joints, from split pin blocks to
sound board rib repair.  I have used hide glue for wood to wood
joints.  The people I trained under used hide and carpenter's glue
according to the occasion.  There are advantages and disadvantages of
using any glue.  There is an advantage of gluing pneumatics to decks
using Tight Bond, or white carpenter's glue.  If the pneumatics have
been split off then using white glue enables one to see that the glue
is truly covering all of the area.  The glue is brushed on both pieces,
the pneumatic set in its place, then lifted.  The distribution of glue
is immediatly  apparent.  Any "misses" can be touched up and the
process repeated. You can catch over flow too.   Hard to do with hide
glue as it sets up too fast.

   Rubber cotton pneumatic cloth is always glued with hot glue.

   In gluing seperated ribs from sound boards, the glue must be spread
in between with a pallet knife.  (or ground down hack saw blade)  Hard
to do with hot glue.  No problem with yellow glue.   Accoustical
properties of the glue?  A moot question, the success of the repair is
in  how bad the sound board was "broken" not how the glue will
"conduct" sound.  Carpenter's glue works good for seperated veneer.
Gives you a lot of time to work it in and set your clamps.

   Key bushing felts, the "Old German Master" sized his felt, cut it,
then glued it in all with white glue. He learned with hot glue,
gave it up for something better.

   Back catch leathers?  Alway hot glue.  Sets real fast.

   Ever wonder why traveling papers were never glued in.  Couldn't do
it with hot glue.  However the tiniest wiff of white glue on a voicing
needle, and your traveling papers will never travel.

   White glue, yellow glue, Tight Bond, aliphatic resin, if its good
enough for my mentors and Reblitz, its good enough for me.  Just don't
confuse Elmer's School Glue with Elmer's White Glue.  Tight Bond is
better.

Richard Moody ptt