While you might have already approached it another way for your upcoming Mexico Pavilion project, this is one of the better HD takes of the old animated Gran Fiesta Tour ending I've seen. https://www.youtube.com/watch?v=6zt90B6Vblg
I created a thread in the wdw secrets forum regarding technical detail on wire guided ride systems.
I wouldn't be surprised if you never visited that forum. So I thought I might invite you to have a look at the thread. If you have any relevant information or corrections, I would sincerely appreciate reading them.
Martin - I know you're working on the next two Imagination tributes...
I have copies of 9 episodes of the "Language Arts Through Imagination" series - pulled them from VHS copies I was able to interlibrary loan to my university library. They're yours to use if you'd like.