Would it be possible that AGCO is either buying the rotor from St. John's or paying royalties for the use of the designIJ AGCO's "Performance Kit", which is extended rasp into the discharge, is made by Sunnybrook and sold by AGCO. The name "Sunnybrook" is cast right into the back of the bars. I find it hard to believe that AGCO would outright copy a patented design - that's Deere's department! Tom langan