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DT, you might be right, but i'd still measure it.
it's on the minor thrust side. i've seen wear like that before. the loose fit will allow the skirt to push on the major thrust side but the top of the piston will rock and try to dig into the minor thrust side. just another option to explore. it's just a picture so it needs the finger test



The finger does tell all. I was talking to a friend yesterday, about the profilometer finger test