My shredder broke. It started making bad noises and stopped shredding. So I took it apart. I monkeyed with the guts, put it back together and got it working again.
About the best your hands can look after they've been in a shredder.
These are all the parts left over after I put the thing back together. Somehow it worked just fine without 9 washers, 3 screws and four black things.