The other problem I am having is the difference in the number of steps between decks between Stairway D and E. All is good from 5 deck to 1 deck then it starts getting off by one or two steps from Q on up (D has more). If anyone has an answer, I'd be happy to receive it!
Exciting news! (at least for me) The mystery of the extra steps is solved! After several hours of looking at photos and videos today, I see now that all the numbers of steps between decks for D and E Stairway are equal.
The hidden gem of a detail took me a while to find but it is that Stairway D between 3 and 2 Deck and again between 2 and 1 Deck have 16 steps in a set of 5 - landing - set of 7 - landing - set of 4 (NOT 5!). The same nuance applies to the steps between 1 and Q Deck and Q to U. The nuance is massively subtle but something that is very characteristicly quirky of QE2 - and too long to explain properly here.
I'd be happy to explain in more detail at a future QSF Zoom call or by email/private message. If also desired, I'll tell you about how I derived horizontal and some vertical measurements about the ship (hint: think about some signs onboard and the 2000's carpet). It's not quite walking about the ship with a tape measure (which I hope to do some day soon) but its the next best thing to getting that level of verified accuracy.
I love this project!