Thanks for the information.
The file is, as I said in the first post, a solid.
The end use is to make little plastic things.
I would, defiantly or otherwise, consider better software for doing the modeling except that this is possibly a one off deal, even if it becomes more frequent, it would take a lot of work to justify the software. I am looking at Transmagic to translate but at $1600, it's probably not feasible, much less solid works or such. I also don't see the limitations of doing the modeling in autocad although it's probably from lack of experience with anything else. I would be interested in hearing what the limitations of autocad versus other things are.