When I first started shooting with my Exocet 200 , it had the stock xcel string and it lasted about 150 shots , but I would have to say that at around 75 shots or so the claw marks were showing on the serving.
SOOOooo before I put DNK's string on, I polished the claws with real fine, super fine sand paper......this in turn made them super smooth. Then after 100 or so shots with the DNK string , no claw marks were even beggining to show. I know this had to help on serving wear.
But all my smiles came to a halt.....I dry fired the DNK string.....stupid me.
Well I tell you what , this church going boy let out some choice words that may never be forgiven LOL.

SOOOOooo , I now have another DNK string on with about 50 shots on it....I'm smile'n again.
BOB in PA