I was just talking about Revit with someone and the questions came up about large projects with lots of linked models, what's in your "main" model?
My own experience has some architectural element "dominant" and therefore all the other models are linked into that model, but their experience on larger projects was to have an "empty" main model which all the models were linked into, since they were all of equal value and linking was only being used to manage file size. Does your experience favor one method over another? What, if anything is in your "main" model?