I am now in the middle of smoking my first brisket. I have an 11 pounder smoking on a UDS. I started at 2 this afternoon with a temp about 235. It has now been 8 hours and internal temp stuck on 150 for about 2.5 hours. Does that sound right. I plan on foiling at 170 and cook till 190. Then wrap in a towel and rest in cooler for a couple of hours. Am I on the right course