The barry-clari guide to replacing a pad 
1)
DO NOT attempt to replace a pad unless you are sure you can remove/replace the relevant keys!
2) If you can, first remove the key (and any other keys that need to be removed), and remove the old pad. Make sure you remove
all the pad, and if you're unlucky enough to find it's been glued (as opposed to shellac) in, all the glue too.
3) Put a little shellac in the key cup. Warm the shellac by heating the key under the key cup with a cigarette lighter.
4) Put pad carefully in key cup. Let the key cool down, and the pad stick.
5) Pierce the pad with a needle, to depressurise it.
6) Put keywork back, and test clarinet.
7) Congratulate yourself on a job well done.
