Cylinder #7 down on compression

I'm just passing on 40 yrs experience working then owning a large auto repair center in our Capital city.
I had an outstanding mentor, and I trained 3 apprentices.
If one of my mechanics showed me that piston, compared to others, I'd want to know why, and certainly warn the customer that something was awry.
I come here to share my knowledge and experience, while "hunting" on a different site .

And miss the juicy stuff from those on ignore, rofl