Regen is easier than it sounds. If you are working with the tractor(2000 RPM+), you don't have to do anything. If you are putting around, the tractor will give you blinking lights to bump up the RPM's and it will do it by itself. You also have the option of parking the tractor and letting it regen while you do something else(still takes 2000 rpm's+). I was nervous as a cat the first time I had to do it, now I just let it do its thing. If you are working with low RPM's, it tends to regen more often than if you continually work at higher RPM's. Mine will regen about every 4hrs with low rpm running(moving hay, pushing brush piles), but will regen about every 12 hours or so if ran at 2000rpm's or more. You have to regen at 2000rpm(IIRC). There is a bypass button that you can push, that will let you finish what you are doing at a lower rpm, but you will still need to do the regen as soon as you are finished working. If you turn the tractor off, it resets the bypass and you will need to push it again. Most of the time, I am rotary cutting or pulling a disc and try to run at 2000rpm and just use the gears to control my speed. This way I don't have to worry about keeping tabs on pushing the bypass button. A regen takes about 15 minutes. Once you start using the tractor enough, you will notice a certain exhaust smell that comes when it is getting close to a regen. If you keep tabs on the gauges, you will see the regen light come on and you can make the choice to bypass or bump up your rpm's to let it work. I usually keep tabs on the gauges if I am using the rotary cutter as bluestem seeds get caught in the grill and block air intake and I am watching for over heating. Sorry for the run on, but I am trying to remember everything I know about the region's.