Thank you! Yes, the circular corridor in the engineering hull has become notorious for provoking "gag reflexes" but if you were to illustrate the circular corridor segements from each episode / different E-deck on a transparent sheet of paper and then overlap all those sheets, you'd inevitably see a "whole" circular corridor.
I realized another problem I hadn't paid proper attention to: In "The Ultimate Computer" Kirk, Spock and McCoy leave Dr. Daystrom in a bedroom section (two beds at least), enter a turbo lift opposite the (unseen) exam room which immediately starts to move counter-clockwise horizontally before going into a vertical / diagonal ascent to carry them to the Bridge.
Looks like the only candidate for this turbo lift would be the outer corridor on Deck 6 at the 2 o'clock position. Interestingly, this would also suggest turbo shafts that keep their distance to the transporter chambers and should therefore all be on Deck 6 (and not partially on Deck 7 as currently illustrated. Great, more lab space
It also helps to resolve a problem I had been struggling with prior to the drafts of Decks 5 through 7: If there is a turbo shaft behind the outer corridor on Deck 6 at 2 o'clock, there is no reason not to assume that it extends clockwise to the central stern-bow axis at 3 o'clock where we could have a turbo shaft taking passengers to the bow of the saucer (all it essentially does is take a detour around Environmental Engineering).
P.S. I forgot, here is a parallel thread
dealing with turbo lift "walk around" areas illustrated in the lastest deck plan drafts for the saucer hull.