I purchased a 12# Top Sirloin for my sons birthday 3rd birthday party. There are about 13 mouths to feed. I just rubbed in Worceschestire and 2 TBLS of SPOG. I cut the fat cap as well, wrapped in Saran Wrap and have it resting in the fridge. I am going to smoke this on my Mini WSM. Any ideas about how long this might take? I am planning on eating at 5 PM eastern. Thanks!