Thanks for the notes.
As this is a new engine, I've tried to allow ample time for warm up, and haven't operated any at max RPM, although PTO speed is probably close to 90%. My tractor does not have a reading of DPF filter level, but I've got to think I am getting close.
My typical routine is to start tractor when I am ready to begin work, allow it to sit for a minute or two to allow oil to flow, and then start making my way toward the field I am working at near idle speed, slowly increasing my RPMs as the temp gauge starts to climb. Using this method, by the time I am ready to work, the temp is near the middle of the gauge.
The only thing the manual says about break in is to not operate at full speed for the first 50 hours. Okay, I have owned many new motors over the years, and the philosophy I've always used is to break a motor in using the same conditions you plan to operate it. Not sure how sound this philosophy is, but it has worked well for me on vehicles (diesel and gas), motorcycles, ATVs, etc. Since most of my work will be at PTO speed, that is where most of the hours have been spent.
Again, not sure if this is right, but based on the extended time to Regen, I think I am at least doing that part right. I am also religious in maintenance, so will be doing the 50 hour service soon, and hope my oil is clean and free of metal.