Thanks Dave, the seat kit I got was from Brothers. They are sized for the seat frames, but there is a lot of extra material on the bottom and there is nothing for the hog rings to attach to other than piercing the vinyl and wrapping around the seat frame. I was pulling the material just enough to get the wrinkles out and keep it straight and the hog rings would just rip through the material. it seems like there should be a wire or something on the vinyl for the rings to hold to.