You ever see that documentary though?

“Classic Albums”? Old show from possibly the 90’s where they dig up a cool old album, take the masters into the studio, dissect the song, cIose all tracks except vocals or guitar, that kind of thing. Listen to demos. I see one for “Iron Maiden, Number Of The Beast*. There’s a few others “Black Sabbath, Paranoid”.

Hysteria is a good one too.