So, Had 2 Butts (dual pack) one was 6.7 lbs, the other 4.6. I pre-heated my MES to 250 with a drip pan half full of water on the bottom shelf. Then had the 6.7lb butt on the next shelf up, followed by the 4.6 on the next. Anyway, I have read all the stuff about you are safe as long as you don't puncture the meat with a probe. But, it was early and I was not awake so I put in probes in each. Anyway, the small one got to 140 in about 3.5 hrs, but the larger one took 5.5 hrs to hit 140. (Wonder if it was because it was directly above the water pan?) Should I be concerned?