This whole piston thing is some fabulous information and I thank you for it...but that being said, it does not make me happy. While I absolutely love Benelli shotguns and find them to be flawless in extreme hunting conditions, I just don't think anyone should have to worry about this type of stuff if they are shooting a Benelli. Afterall, isn't that why you own a Benelli? I own an R1 in .308 with some gorgeous wood. I have used it in the field, but not to the extent as it sounds some of you have; and therefore, I have yet to experience any of these issues.....thank god. But when/if I do, I'd better get a little more advice/customer support than a gun smithing lesson on how to better clean my gun. Sorry, just how I feel when I own a spend hard earned money on a Cadillac and not on a Le Car.