Here are two other sources of information about rebuilding a
glued-stack Gulbransen which may be helpful:

1. An old catalog from Player Piano Company had an article in it about
rebuilding the Gulbransen.  I don't have a current catalog so I don't
know if information like that is still included.

2. AMICA Technicalities III has reprinted an article that was published
in the AMICA bulletin of July, 1976 about rebuilding the Gulbransen.

I have these sources on my bookshelf if someone needs a photocopy.

Roger Anderson