The influence of the maquette from Star Wars 365 is non existent. The medical bay is not located in the main hold. Instead, it is shown as being part of the crew quarters located port aft.
Frankly, the interior maquette matches nothing seen in the films and therefore irrelevant. It was a concept model. Throughout ESB there's a solid wall there. The actual location of the medical bay is impossible. Leia walks out of a round arch indicating that the main circular corridor of the ship dead ends into the medical bay. It's not very practical.
BTW - Being the illustrator on 3 major Millennium Falcon projects (Haynes manual, 3D Owner's Guide and SW Blueprints:Ultimate Collection) I know quite a bit about the ship. There's nothing in Ship of Riddles that I don't already know.
Feel free to ask any questions, but don't assume that the people behind the manual don't take the ship very seriously. It's a labor of love to be sure. Every source was consulted (including actual set blueprints) and every compromise was carefully thought out. We're the reason Lucasfilm officially changed the length of the ship to 34.75 meters (114 ft.) when it was previously 87.6 ft.
There's a lot of new stuff in the book. We build and expand on previous reference books while fixing some issues when possible. We also made sure the publisher included some of the rarer photos from the Lucasfilm archives.
I would have liked to have included floorplans for the other YT ships (it was discussed), but as you pointed out the YT section was already taking up quite a few pages. We were working with a fixed page count and fixed budget and so I preferred to dedicate the time and space to more Falcon specific art.
Unfortunately, there's no workaround with the page gutter running through the 3/4 cross section and flat floor plans. I hate it too, but it had to be done. I was thankful that the placement worked out so the gutter only ran through the main hold and didn't disrupt many details.
PS - The 3D model of the Falcon seen in the book with the landing gear extended and doors closed is the ILM model built for the new Star Tours. There are a few issues with that model that bother me (the underside landing lights aren't all correct), but there was no way to fix them. Overall it's pretty nice though.
BTW - I love the 3D work you've done Steve! I have been following the thread, just never chimed in until now.