I think I started this but these guys rock and they stand behind there products. Check to see if your cam is giving them problems mine is!!! I went the CC918 route free of charge including shipping. I upgraded to the Comp Cams 7.350 chrome moly push rods.
http://www.katechengines.com I think they are referring to me alot because I sent them 3 broken CC 941 springs. I got one more getting to the last race. However they have sent me 2 new sets of springs free 1 ea CC941 & 1ea CC 918 will be installing this winter. Check and see if your cam is giving them problem first and we can go from there.