Yeah, nice explanation there.

Always great to read about some basics in that Lou style since the modern planes only ask you "how would you like your landing, sir?" only.
I always get back to the needle driven things just because I want to take a glimpse on what it used to be like.
But remember, some of those old flagships are still in the air, so the knowledge is more than current and always useful for the understanding, about the things behind all that modern glass too.