I have a "cast" part that requires machining - the machining has been done in a configuration format as this part is the same in three separate lengths so this should have made it easier to create all sequential drawings.  What has occured is this - after the cast print was complete and the new configuration done for the machining and thus that drawing complete the cast drawing has changed to become the machined part. How do I separate the two or is this not a possibility.  These part files were given to me and I am trying to fix this issue.