Well, it finally happened. The 3046R finally performed a regen. It happened at exactly 50 hours. (Which makes me believe that it was programmed to do so) I was hovering around 65-69% soot. It would go up, I would work the tractor a little hard mowing and it would go down. It had actually gone down to 65% last night right before it went into regen, which further leads me to believe it is an hour limit and not a soot limit. I suspect it is every 50 hours or whenever the soot gets to a high level. (I didn't consider 68% high)
And of course, as others have experienced, it happened at exactly the wrong time. I had literally just throttled back to idle, shut the PTO off and was getting ready to put it in the barn when the little white puff of smoke light lit up. I just let it do its thing. It took about 20-25 minutes. Engine ran smoother than it normally does at 1500 RPM. I did note puffs of smoke when advancing the throttle a few times. I thought that is what we were trying to avoid?
Now she is at zero soot and zero hours since last regen. I noted it wont "zero out" until it is shut down and restarted.