I got two sets from PSE 25 yr's ago an never had one come apart.Jay you must have gotten a few over harden adj's. Years ago when I raced my cammers they saw 9000 rpm ,now I drive them on the street one is in my 40 ford about 15000 on it. I did have rocker brake because high spring prsure for the street but ok now.I have been running cammer for 39 yrs.LOVE THEM john.