In a previous issue of Cook's Illustrated they told about Heston Blumenthal's method of roasting prime rib for a couple days at an extremely low temperature. They stated that no home oven could be set for that temperature, and so they settled for a 200 degree oven. I'm wondering if anyone knows what temperature Heston uses. I recently bit the bullet (after many months of saving) to purchase a sous vide water circulator. I figure that's the only way Heston could accomplish what he did. I've tried some pretty amazing recipes with this thing and I'd like to try prime rib with it. Thanks in advance.