I had my first regen today at 38 hrs. I was using the tractor and the regen came on and showed I need to increase RPM, which I did. It took a little less than 10 minutes. I continued to use the tractor. The whole process was completely uneventful. After reading so many post about it, I expected something exciting (balloons, dancing girls, flying monkeys, something), but low and behold, completely unexciting.