And if that ball were dry, you could make deeper oceans just by breathing on it.
It’s the, “If the earth were the size of a billiard ball...” analogy. I first heard that in high school in the early ‘60s. It impressed me enough that it stuck in my head.
Yer probly right. I’ve been a machinist/engineer all my days so ball bearings being as smooth as possible is the best. You pay really top dollar for for good ones.