This is, hands down, THE most impressive WIP thread I’ve ever come across.
You’re very first sentence “This started as a simple box modelling project on a lazy afternoon and has evolved into a Watch” seemed like such a ho-hum intro to yet another unremarkable thread here, but it now reminds me of the spinster-looking librarian taking off her glasses and throwing her hair back to become a sultry love goddess. 
I certainly hope you’re working in this field, because I rate this as “professional” work.