Pat, since when are you going bald? My Dad has a bald spot on his head too. In fact he's a wheel of fortune fan. But he never said that you were going bald. Hmm. I'll definitely have to ask him about that.
It does tell ME something - how the pressure looks before start up and after the vehicle starts. If you know what it is supposed to do it helps to fix it GREAT job going500mph - don't listen to those others. It is easier to criticize than to trully learn something sometime. I have learned something.