I have a 2010 Toro Grandstand 48" / 24HP. Over the last few months my control arms have become very tough to move. It has been causing a lot of blisters on the hands. I started troubleshooting the problem while I had some downtime and came to some conclusions as to what the problem is. If I put the "speed control lever" in the slowest position, the controls are like they were when it was new. I can operate the machine with my thumbs. But once I put it in the fast mode it becomes stiff again. I read somewhere that they (Toro) suggested to remove the " speed control" and rework the system. I called the dealer and they said they have not had to do this but would check on it. Does anyone have any experiences with this?