Hey guys, I have a set of rocker arms that I converted from a hydraulic to a mechanical adjuster and I am having problems with the adjuster screw im currently using. Whats happening is that when the adjuster screw hits the valve lifter, its digging away at the top of the lifter causing a minor pit to form. The adjuster screw tip also has had some material that has been grinded away. I cant find any other adjusting screws in that size except for some steel set screws from mcmaster-carr. I purchased them and will get the ends machined to a round point with hopes to use them. I believe the oem hydraulic rocker arm has a hardened steel tip where it contacts the valve lifter. So I was wondering if the machined set screws will prevent more damage to the end of the valve lifter or would I have to harden the set screws? The set screws have a rockwell hardness of C45 according to mcmaster-carr. I have no idea what type of material the oem rocker arm is made out of. Also, why would both the valve lifter and adjusting screw have damage? Shouldnt it only be one or the other if the hardness was different? Thanks in advance for any help guys. Let me know if you guys are confused about anything, ill try to clear it up.