By looking over my Sunnybrook rotor after one season, it is obvious by wear pattern that material is going another round on the left side of the concave. Have wedge installed. Is the steep helicals what has been known as the edible bean kit?? What part numbers needed? How thick of a spacer strip is needed to set them close enough to the rasp bars? Will this setup work in tough green stem soybeans that may not want to "slide" sideways and may grind past the steep helicals? Any experience with pluses and minuses? Thanks!