[earossi]

It is my understanding that many rocker arms are out of parallel between the follower arm surfaces and the centerline of their bushings. This leads to the follower portion of the arm slightly out of being square with the cam lobes which leads to the asymetrical loading wear pattern that appears in your pictures. The solution is to have the rocker arms machined to true them up. I've been told that this condition can exist on new OEM rockers fresh from Porsche!