I found out today why I can't get my Super A into gear - 2 of the pressure plate fingers are lying in the bottom of the tractor. I looked at the kits sold on this site and there are two available - one is listed as containing a spring loaded clutch plate, the other a solid clutch plate. Both kits have all the other stuff for a complete change out of the clutch components. Both say replaces both new and old style clutches. I don't know what is in the tractor at the moment but expect to have it split tomorrow. Why are there two styles of clutch plates - one a newer design? Is one recommended over the other?