Rich, nice going!
======================================
I do like the idea of having links associated with objects in a model which could open any file related to that object (a map, manufacturer's spec, emails, etc.) by any viewer or app already installed on the user's PC. It would be useful in organizing information when reviewing a project with collaborators or when making presentations. The SU file and associated documents could all be stored in a common folder in dropbox, Google drive, etc.