GLH- with all due respect, I have never had to take a butt above 185-190 degrees out of my Smokette. Letting it rest so it cooks to 190 or so degrees makes a great hunk of pulled pork. If you take one to 205 degrees, (which means 215 degrees in the cooler) means meat that may be overcooked in my opinion.
I am interested in your data that leaving it cook in the CS smoker to more than what I mention above this makes a better product.