I'm going by Jeffries external drawings found in TMOST. There are three drawings that all show the shuttle with a person and are all the same 22' size. As well as the hanger and small shuttle model being built in scale with that intended size and the large mockup being almost that size (it is actually slightly shorter than 22', I think it is 20'10"). And I'm not interested in making sure everything we see in the Gallileo Seven can fit exactly like we see in that episode. Almost none of that is used again and some doesn't really fit, even at larger sizes, unless you redo the exterior. I'm more interested in fitting the shuttle in a 947' Enterprise and then fitting the interior into that. And while the aft room has always been an issue, the rest of the interior, the main cabin, does fit. You can fit 7 seats in the space and have a nice aisle and gap for the door. And we even see at least one seat on the inside of the large mockup. Star Trek has a lot of contradictory set changes to begin with so conforming the interior of the shuttle and compromising those few extra spaces seen in Galileo Seven is acceptable to me. I've lost track of how many engine rooms the ship would need to fit everything we see on screen exactly. So some compromise to draft a ship that would fit what we see in the series is acceptable to me. So for the ship to remain at 947', I feel that largest the shuttle can be is 22'. I think Jefferies knew that and intended it be the more cramped 22'. His hanger model, while needing some corrections, was built in scale with an intended size so that the hanger shell would fit in the 947' ship. We can discuss whether to go by the length of the model or the length of the hanger in his cross sections, but either way it fits in 947'. I think you might be able to push it up to 24', but that requires adjusting the decks to fit the shuttle. And for decks I am going by the windows on the exterior (wtih them being a consistent height off the deck). But that is my interpretation of the ship, hanger and shuttle. Others are free to make it fit as they feel it needs to. I am just explaining my reasoning for my project. I'm trying to stick to Jefferies drawings and intentions and the 11 foot model. There are some differences, but there are reasons behind them.