I am trying to make an assembly of a pair of drawer rails. I mated one set already and I am trying to insert this same assembly so I can have another side. SW won't let me insert the same assembly. I think I have to mate another rail set for the other side of the drawer. Is there a way to link the mates from one side to another so that if I slide one rail, for example the right side and the left rail also slides? This way they both do at the same time.