yes i have and no i do not use any of them lifters. but i hear the morels are good ? JESEL great stuff but to much $$ for my customers i buy the crane bulk run them abit and pull them out put new in the comp super i thing are not that hot i can buy to set two sets of cranes for the price of the endure-X comps with the hi rent stuff you may use it past it s life and get in trouble i have the crowers severe duty too with oil feed i like that for low speed .on the manleys nexteks have set them up on race heads and the PSI springs the isky alloys are the spring that i have had the best luck with on the street and howards pro-alloy electro polished i have used to but not as much as the isky