We are part of a university and have just acquired a Patriot ShopMaster with Mach 3 CNC software. What CAM packages should we consider? We have to work in a modest budget maybe $4,000 or hopefully less. We will create solid models using Autodesk Inventor. The most complex shape would probably be something like spherical shapes on the lathe and pretty simple work on the mill. We would like to be able to thread on both the lathe and the mill. Any and all thoughts will be appreciated.