I'm currently using MDT6 and my company is somewhat interested in upgrading to Inventor, but i have some questions. I also have SolidWorks 2003 but i don't really use it, mainly because i don't like it. SolidWorks' main disadvantage to me is that you have a part file, and then you have a drawing file that references to that part file, and i'm always losing the drawing because the file name is different than the part file. i was wondering if Inventor is like this, or do you have a 3d model part/assembly and the drawing in the same file. this i think is just one of the many advantage of mdt6 over solidworks.