MAYBE NOT SURE,I DO SHARPEN MY OWN RSC CHAINS,NOT SURE WHAT NEW CHAIN HE HAD,BUT I DONT BELIEVE EITHER WAY IT WUP ALL OVER THE 361,WHICH IAM NOT SAYING IS A KING OF SAWS OR ANYTHING,JUST MY COMPARISION OF THE 2,ANYWAY WASNT TRYING TO ARGUE THAT POINT,THANKS ANYWAY