George Bovard asked about rebuilding Gully pneumatic/valve units. I
assume he has them off the shelves, if they are glued on. If they are
the screwed on kind, here is how to rebuild them.

Just like Simplex, Gulbransen is a rock maple unit valve that has to be
broken apart if the pouch is to be replaced, which I strongly suggest.
If you saw the suggestions regarding Simplex unit valves, you might try
one or more to see which you are able to do best. I would also suggest
something else a little different. Now I have never tried this trick,
but it might work.

In my book, The Orchestrion Builder's Manual and Pneumatics Handbook,
you will notice on pg. 92 is a picture of a slotting saw. They are very
thin. The saw pictured are two saws stacked together to make a thicker
cut. Were you to rig up a setup about like this one shown, you would be
able to precisely cut each pneumatic at its glue line, all around
without taking out very much wood. Cut it only about 1/16" deep, 360
degrees around. Then you can wet the pneumatic briefly, and the water
will stay in the fine slit you made. after just the slit has been able
to dampen the old glue (without soaking the entire thing) you could
then place them in a microwave, adjust your timing, and take each one
apart very easily, I should think. Just slip a knife blade into the
slit you made, and pop it apart. It certainly seems like that would
work well.  As far as the slit in the back is concerned, this will
completely fill in with hot hide glue when you put them back together.

Craig B.