I want to thank Don Teach for his detailed posting, which will save me
time figuring out the right number drill to use to create my own supply
of the brass damper plates.  Yes, I could figure it out, but he saved
me much time.

Now to build a fixture for my mini-mill and see how many I can drill
before breaking the bit. :)  I bought the mini-mill for toy train work,
but now it's going to be used for piano work; maybe I can amortize it
as tools now?  Heh heh heh! (The toy train stuff is just hobby.)

David Dewey