Bear, were you on the #2 controller or the Auber? Saying that you hit 278, I'm assuming that you might have been on the Auber. See my post on the Auber Tips & Tricks board about inconsistency. My last rib smoke was very much like yours. Yesterday's pork butt locked in and performed perfectly. Again, if you are running an Auber, try a different piece of meat before exploring a new element.