This is a fascinating website that I stumbed upon.
"Piano Owner's Survival Guide"
I happened upon this site because I have acquired by my own choice the burden and (I hope) joy of rebuilding a piano. It's old and beastly, but it has some music in it and I figure it'll be good fun.
This website has a "How to repair it Yourself" section. And that's what what got me there (via Google). But the whole site is quite something. Take for example, a whole section of cartoon drawings by the site owner (Dr. Schnock's Music Primer).