Anyone get a sore knee after operating the HST pedal for a few hours? I have never had unexplained pain and a swollen knee in my life (usually it is obvious what I did when I have pain), and now have had pain and swelling a couple times just in my right knee in the past week. I noticed this again today after a couple hours on the tractor last night and the only thing I can think of that has changed at all in my routine is running that tractor foot pedal. Wondering if anyone else has experienced this and what might be done to prevent or eliminate the situation.