Adjust your valves. Its like checking for ball cancer. It can nip a big problem in the bud and it can be fun in the right light, with certain music. As long as you are doing your own. I mean you can adjust valves for others just dont check them for ball cancer. That would be awkward.

I have no faith in human perfectability. I think that human exertion will have no appreciable effect upon humanity. Man is now only more active - not more happy - nor more wise, than he was 6000 years ago. Edgar Allan Poe