Thanks to all for the information on gluing plastic to wood.  I am
working on one of those "1950s things" (not worth rebuilding, etc.,
etc.).  I am having a lot of fun with it and I think it will be
serviceable when finished.

The valves are a three-piece plastic arrangement that glues directly to
the wood of the stack pieces (three-tier stack, no cork or leather in
between).  It was apparent upon disassembly that some kind of glue had
been used with which I was unfamiliar.

I immediately got three responses to my question about the "best" glue
to use, all from rebuilders who have had experience with the problem.
The glue they use is Duco Cement, which can be picked up at Home Depot
and a number of other place.  Actually, according to one correspondent,
Aeolian recommended this particular glue in some kind of early
publication on those 1950s pianos.

Thanks for the great service from the MMD web site!  Have a great
Thanksgiving.

W. Deane Wiley
Las Vegas, Nevada