You may find that as an old customer there will be an upgrade price that is better than a new user would get for buying the current version.You can try the demo versions to see if enough of the system you are familiar with is still there.I rate Rhino highly for both CAD and CAM and find it a big bonus to not have to export a file and then import it into a different CAM package.That kind of double translation often results in curves corrupting into dozens of small line segments and untrimmed surfaces appearing and avoiding this situation is always welcome.Its a while since I was using Rhino and the latest version will hopefully have improved even further.