I usually hate to do sales work for software company even when I was paid for, but I am quite impressed with Naviswork's performance on real project and the types of files it can open.In this case you should definitely forgive yourself, for Navisworks is indeed an impressive program and thank you for suggesting it. We use it extensively for reviewing already and to some extend for clash detection. What I need is something entirely different, though; we need to be able to convert from one format to another - both could be anything. It could be from PDMS to Microstation or from Architectural Desktop to PDMS or from Microstation to Maya. Basically it is one or at least very few tools that can cover almost our entire conversion need that we are looking for.