Extremely interesting set. My only (small) caveat would be the "Shift Lock" legend — all(*) other mods have "modern" legends, so going "back" only for the Caps Lock key strikes me as odd.
I look forward to seeing this in action.
(*) Yes, there's "Return" instead of "Enter" on both alpha-block Enter keys, but that one key has had this "dual identity" for ages, so it's not an issue. And yes, there's "Lock" instead of "Scroll Lock", but that's a different, modern defficiency (YMMV) in current sets.