When I received my Pat Dually and had some problems I was in contact with a tech guy at Bowtech who was very knowledgable. I asked him about string & cable stretch and if my dually had a WC setup. His reply was that Bowtech was no longer using WC because they(WC) wanted Bowtech to market their bows that had the WC setups as just that, and Bowtech didn' t want to market their products that way. Now this was from a bowtech rep but take it for what its worth. I' m not saying it' s gospel, just what a person at Bowtech told me.