Recently started using a Pac Nat Gut/CoFocus Hybrid and while I love this setup - I am not getting the expected durability. (strung at 52/49 - and 17g each) Even after 2 hours play I'm seeing some fraying on the gut - and I'm only getting 6-8 hours of play from it. I have an aggressive swing - lots of topspin on the forehand and slice on backhand. I've strung with the gut 3 times and continue to struggle with watching for kinks - (they seem to just magically appear). Can stringing issues be the cause? Would switching to Pacific Tough Gut provide more durability? How might it play differently? Any other thoughts? I would love to stay with this setup - plays better than anything else I've tried... but can't afford to replace this every 6-8 hours.