Just had a huge success following your instructions, fourunder -- thank you! Two standing rib roasts: one 7.5, one 6.5 (three ribs each) for ~40 people as part of a sit-down meal. Brought them up to room temp, rubbed them down with ample salt and ground fresh pepper, and then in at 225* with a temp probe. Based on the numbers I had seen here, I was fully expecting 3.5 to 4.5 hours (or more) to hit fourunder's 118*, but to my shock, it as at 118* after a mere 3 hours! By the time I pulled it, that site was at 121*, with readings ranging up to 129*. I wrapped both roasts in tin foil (triply wrapped) and -- per fourunder's loving instructions -- moved them away from all drafts and covered them with a blanket. This was throwing off my plan a bit as it was 5p when this happened, but we did not intend to be eating beef until 8:30p. After some frantic reading here, I inferred (correctly, I guess?) that a longer rest period would do no harm -- so the two roasts rested for nearly 2.5 hours (on top of it all, dinner was running late). At the point that they went back in, an instant read was giving me 129*, which matches roughly what I expected the carry-over to be given that the temp was ~124* when I initially pulled it. Then it was 250* for 30 minutes and the 500* blast for another 8 or so. Interestingly, during the entire warm-up and blast, the probe never budged about 129* -- pretty clear that the center is not being warmed by that process! Anyway, pulled the roasts out with some apprehension that they would be either too rare or otherwise too cool -- but the beef was terrific. Biggest problem (such as it was) was that the beef had to wait on the potatoes and therefore was a tad cooler on the plate than I might have liked (we couldn't warm the plates, which would have made a difference there). Many, many people were saying that it was the best beef that they had ever had -- and I think that that might be true of me as well. I was terrified of screwing up dinner for 40 people, but thanks to fourunder's clear instructions and patient clarifications, it was a huge hit! Thank you, everyone -- and fourunder especially!