Here’s yet another new feature for 2013. When you create an opposite-hand version while mirroring a subassembly, all the standard mates in the subassembly are mirrored as well. Previously, standard mates within the subassembly that mated to the default planes or origin of the subassembly were not created.
Matthew West on September 05, 2012 at 09:49 AM from the SolidWorks Blog