help please,[p]i bought a 1.5 lb porterhouse. coated with DP cowlick. brought my medium egg to 700. did one side for 2 minutes (i didn't realize how hard it would be that hot and had to go grab a mitt). second side for 1 minute. took off and adjusted egg for 400. put steak back on in 15 minutes at 400. cooked for 6 minutes, turned and cooked another 6. steak had wonderful flavor but it was tough and chewy and even a bit dry. any ideas?