I think your plateau is generally between the 140-150 mark. If you stick at 159 for too long, and if ya plan to foil at 160, ya just might say "CLOSE ENOUGH! This ain't an exact science! Looks great so far though!
Ok, we're moving again. Stalled at 160 for almost 3 hours . Foiled er up at 165 and temps are now continuing to inch up. We might eat tonight yet . Here are some pics right before going in the foil. The bark developed nicely during the stall.