I'm chuckling, Mark. I guess some quips ARE 'universal'.
Yes, I experienced the meaning of 'assume' at 19 while also learning that there IS a reason for checking everything...
Being up against the clock, I had decided to skip the bluing check on a set of freshly ground valves and seats before head assembly... Heck, it had never shown me anything on any valve job I'd done.
When fired up, the rebuilt engine ran, BUT... After a vacuum check, compression test, and cylinder leak down test... I took the heads back off for dis-assembly because the valves seemed to be leaking!?!
IF I'd used the bluing check, the slightly misaligned valve seats would have been detected. A bent Sioux tapered valve guide pilot??? Yup. Really!
So... the importance of not taking shortcuts became evident.
NoShortcuts
a.k.a. Charlie Brown
near Syracuse, New York