Is there a way to save as a project, design, or harness diagram? If not is there a way to copy an existing diagram or harness construction and maintain connector and wire values?
This is possible, open the project, then RMB on the design and choose "Copy" or "Export" (in case you want an XML version). But you need to select the design itself (not the folder and not the diagram, but the design - and finally you can't copy a design if you have any diagrams open).
Let me know if this works,