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Anyone have a view on the marker world cup piston plate vs the energy rail system by volkl. I had that world cup piston plate on my p50wc skis and did not care for it nearly as much as the plate on my p40f1s with the rail- I have found that the piston plate is heavy and I did not see that big of a difference except in my wallet . I have been told that the energy rail can be purchased by itself and mounted onto any ski .