Larry, I like to see complete ATC cook graphs to compare to my own cooks and better plan future cooks. Looks like you've got that Stoker working real good for ya, with a very short ramp in coming up to temp. Very cool.
Anyhow, sixteen hours for couple of 8 poundish butts is a little longer than I get cooking with water at about 230* at the grate if I position the probe between the butts (hanging below, actually), but where exactly was your pit temp probe tip, and did you cook both butts on the top grate? Any tips you'd have on the best way to measure grate temp would be greatly appreciated. My probe is a Maverick high temp 90* probe, not the short straight probe that came with the unit. I fried that one, but the newer one is a little trickier in some ways to position. I did some shorter (12-14 hr) cooks but have decided that my 14-16 hours butts probably come off more evenly cooked, cooking with water two to a grate, at least.
Thanks for any tips you might have.