Finally got around to the test of combining CI's method with sous vide. Trimmed some of the big fat cap, left enough for later. Salted for 24 hours, bagged and cooked at 58 C for about 36 hours. Cooled and browned off on the Big Green Egg. It'a a winner! I might actually use 55 C next time - I was allowing for my husband complaining about the pink.