I'm new to the Big Green Egg and to the forum. I've used my Egg a few times and have been happy, but last night I made a Prime Rib roast and it was terrible! It was a 3 rib roast and I cooked it at about 310 until the internal temp registered 140. I took it out and let it rest a bit, but when I went to cut it, it was like cutting through stone. It was EXTREMELY tough. The inside was pink though, but not moist at all...it was completely dry. Any ideas what went wrong??? I was hoping to make my Christmas Dinner with this, but I'm having second thoughts now.