I have a 2007 Case IH 2577 with rear wheel assist. I have only run the combine for three days thus far and have noticed that the steering is a bit hard. (My left arm is a little tired by the end of the day!) I was wondering if anyone else is having this problem with a 2577 or a 2588? Has anyone had hydraulic pressure turned up? or added a second steering cylinder as I have seen available in the parts book? Thank you for any responses.