Hey, I have a model that was generated by a program. It looks fine, when I checked it in NetFabb it said it was made of several shells. The only problem is that I don't know if all the shells are overlapping. So I don't know if I'll get my whole model, or just lots of little bits I'd have to try and glue together. If someone knows how to check it, or turn it into one shell, that would be fantastic.