We have never ran a STS machine before. We traded our 9610's on a 9870. We will probably be pushing it quite hard. My question is, what is going to happen when you throw the additional horsepower to the 70 series while all the threshing dimensions are the same as on the 60 series? Does anyone know what is the weak link in the STS? Rotor belts, concaves, concave actuators, feed accelerator, what about the feederhouse slip clutch, will it keep you from overloading the threshing system. We will be running a macdon fd 70 up front in wheat, milo, and soybeans. And by the way, I fully understand the john deere is limited by it's cleaning capacity.