As I work on my latest real routes, one of the cardinal rules is knowing when to stop adding details. And that is when the details are known. In a way, you're lucky if the original no longer exists or is so obscure that they are almost impossible to find - then do what you like. If anyone complains, have them prove it.
Good point, wish more people would do that. As well, if all the works-in-progress had WIP in their titles, there would be a lot less confusion as to what to expect.... most of us who build model railways in Trainz use is to have 'MR' in the layout title.