Gentlemen, I believe I'm totally on your "page" as - like Mytran - I consider myself a "groupie for set accuracy" and feel that what's on screen or can or should be concluded from the visual and oral information is prime directive canon.
I'm neither interested in a theoretical Jefferies' Enterprise
and most definitely not in yet another Joseph version.
I just quoted from The Making of Star Trek
to illustrate that even the 947' figure is rather a best guess (considering what happened before) and that the impulse deck had been there from the start and is not any fan's invention.
More to come in the next days. I would like to revisit some original ideas and concepts from the beginning of the thread that seem to have gotten neglected during the work in progress. Have a great weekend!