We are preparing to use Revit 08 on a larger scale project than previously attempted. It will be a 4 story office building. The sets will be issued as core and shell sets. Right now I'm looking for general advice on how to set up the project structure. Right now looking at it from a broad overview perspective. Do you use multiple files for floors / TI / Shell? Use phases for Core / Shell work? Etc.? Can anyone share any advice or tips on similar type projects? Approx. 60,000 s.f. total.