Re: Constitution, Miranda, and Constelation Class
The Excelsior-class model was damaged when modifications were made to it for an appearance in Generations, yet the producers elected to pay for a new model. There had to be another reason why the Ambassador-class model wasn't used again.
Or a reason why they needed another Excelsior model. They built a smaller one for Voyager's episode "Flashback" right?
"It's not that you can see the strings, it's that 40 years later you're still looking at them." - Steven Moffat
"This movie was big. Imagine how big it could have been with me in it?" William Shatner