We can't add attachments to the Top 10 list. So I am adding this here, then linking it back to it.
Discussed here:
Maybe it is a waste of time and space......but here goes.
See the attached video on how to link a Global Variable to a distance mate.
There are some things that will backfire, though. As an example....if you then edit the mate, the program doesn't give you a clue that it is linked.
SolidworksModeling And Assemblies