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I added that exact plate to my Sport 15 this year. Outstanding results. It added 1-2 mph to my top speed and allows me to go into very skinny water (just got back from a week at the NC coast and it was really handy running the shallows of the intracoastal waterway). Another benefit was the result of moving the engine almost completely out of the boat. To compensate for moving the CG aft I moved the battery from the stern to under the rear thwart seat. There are some pictures of my setup on my personal page.