Gotcha. I see the Micromatic sells that assembly, but at $1800, I'd rather figure out how to make it myself :)
https://www.micromatic.com/kool-rite-inserts/12-faucet-kool-rite-insert-short-shank-1737-s
And thank you for the tip on the Superseal version of JG
Anyways, your setup looks amazing...