Just left it on for a couple of hours and then checked it a few times with the ThermaPen. It stayed a very constant 140°. Although I posted about the temps in the March 7th cook thread. I can see why circulation and size of cut make a huge difference. Not thinking about theses things, I put that 5lb. Eye of Round in the Crock Pot, with hot water from the faucet, about 125° at about 8pm. Checked it at 10:30 just assuming it would be 140°, it was 113°. I say, ahh, this piece of meat was cold and I should have started with hotter water. So I dump out water and put in 160° water and go to bed. Wake up in morning and check temp, it is 135°...
Meat was in the water for 20 hours and came out beautiful...Pretty sure I will cook the 75lbs of remaining Eye of Round this way, then about 3 hours on the Memphis, then a nice 10 minute sear to finish at 650°. The folks who sliced it today seemed to think it came out pretty good!