We did not want ot spend the $3500 the dealer required (Cat paid the other half) to go with Cat's chopper. Instead, Rodono Industries out of Clive, AB installed their tabs and blades (much heavier and longer than the Claas ones)on the original rotor. They were quite surprised with how heavy the tube already was, and with how well it balanced. German quality!!! We also doubled the knives and hammers, all for less than half the cost of the new chopper. As it turns out, we would not have had to add Cat's newer drive setup (500 rpm more) as the inertia from the heavier blades was more than enough. We had friends with the new CAT (redekop fine cut wide spread),and we probably had a finer cut and almost as wide of spread, still utilizing the CAT original chopper body.