Were you doing the 3-2-1 rib recipe? I've done ribs a few times on my 575 and find that they come out much better with a little higher temp anyway. I didn't have good luck starting them at the 170-180 range. Now I use a higher temp all the way through and they are falling off the bone tender.Thanks for that. This stayed tight in the low 200 zone foe 2 1/2 hrs. I pulled the ribs they for the second phase at 225. And has no problem holding that temp. Just won’t founder 200 degrees.