Somewhat related to the topic question: Anyone else seen their "traditional" iron adjustable rockers (e.g. Crane) leave noticeable wear patterns even on chromed aftermarket rocker shafts? The last set I ran (mid-to-late '90s) left grooves on the loaded areas of the shafts that matched the machining pattern inside of the rockers. I always thought having bushed iron/steel rockers would have been a better idea after seeing that.