SOOO..off this week and between chores, bourbon and relaxing...smoking a little too. Never tried a pork sirloin roast (fancy name for tenderloin I guess) on the smoker. Picked one up with at least. 1/4" fat membrane intact. Used nothing but my favorite rub, and a mustard massage. LOTS of smoke, cooked it at 250-270 for almost 2 hours and the cranked it up to 350-360 and brought it up to an internal of 150. Took it off and tented for 20 minutes. The folks in my house don't eat at 930PM often especially after supper, but it smelled too good not to try. I'm gonna have to say I'll do this again. Absolutely fantastic! Sliced it, and man was it fine eatin! Certainly don't expect it will warm up and taste the same tomorrow but after resting post smoke it was fine eatin.