Well, I have hundreds of passes and no issue. The valvetrain is very happy. Usually if things aren’t happy you will find evidence before parts break. Locks that are super wedged in the retainer, chatter marks on the valve stem from the locks, valve tip damage, guides that wear quickly, valve pounding the seats, lash changes, etc. only problem I had was the exhaust valve tip was getting pounded. Solution: stiffer push rod. Not using guide plates allowed me to use a Manton series 5 pushrod which is not hardened for guide plates. The series 5 at .095 wall is as stiff as a series 3 for guide plates at .145 wall. So I get all the stiffness without the weight. A better investment over shaft rockers at this level would be titanium valves. I could then take a bunch of spring pressure away and it would be easier on the entire valvetrain.