Yes, unfortunately. Should have added, "rolling contact fatigue". One thing on that. My springs (as most do at 300 ish) had float. One theory is if you're on the cusp, valve float will compound the problem as the valve train 'chatters'. Not all lobes had issues. In fact, most cams have only displayed symptoms on some lobes - often cylinders 5 and 6. Since I've fitted the PAC Springs and donor CAMS, there is no further signs of wear. They were checked recently when I replaced the HLA's. I still use Nulon fully syn but have gone to their long life 5W-40. Anyway, hopefully we'll have the full findings soon.