I have to get into this discussion regarding gaskets under pneumatics.
If any of you folks out there in player restoration have ever run
into an Auto-piano stack, with the lovely leather gaskets under the
pneumatics, you'll often find that these gaskets don't give up very
easily and often take a great toll on the pneumatic bottoms as well as
the decks.  After you have successfully  removed the pneumatics then
you have to sand the leather off of both surfaces before you can even
think of re-gluing anything.

I have no idea what type of leather was used but it's the toughest
stuff I have ever run into and it's a nice multicolor selection.
I would almost swear that it was scrap from a shoe or purse factory.

Next on the list is the Chicago Cable players that used newspaper
gaskets on many of the player stacks, and now they are more than ready
to fall off without much effort.  Kimball also used paper gaskets on
their later player actions with great success.  The Kimball thing was
a blessing as anyone who has ever done an early Kimball stack can
attest, i.e., all the broken bottoms and torn up decks left to deal
with.

I don't care if you use paper or thin leather gaskets, just be sure
to use the good old hot glue.

Jim Jelinek