How is the T670 performing compared to STS models...in small grains/canola? We run JD walkers and STS and I'm having a hard time being happy with these machines. JD walkers don't have enough capacity and the STS not very impressive in small grains and tough conditions. We also run a wide rotation of Canola, Wheat, Oats, Soybeans, Corn and need machines able to handle all these crops....would a T670 handle Corn and beans???