Very nice work. "K4" is a great source for stuff. 👍
Back in the late '70s/ early '80s, David P Morgan wrote a piece in "TRAINS" magazine about the PS4. I don't remember the title, but I was so impressed that I wrote a letter to him, then forgot about it. A few weeks later I received a letter back, from him, thanking me for my note!
I still have that letter someplace...🙂
Mark in Oregon