Today, I'm preparing chuck roast burnt ends for the first time. Last night, I cubed up a couple of 3-lb chuck roasts and rubbed one of the roasts with my homemade rub and the other roast with some Smokin' Guns (hot) rub for an overnight rest. I set the Smokin' It 3D smoker to 240* with a chuck of hickey and a chunk of maple. Put the cubed chuckies in the smoker for a 1.5-2 hour smoke. I'm going to start checking on them at the 1.25 hour mark to make sure they each get a good smoke on them without overdoing them. Since I'm going to braised them later, I'm shooting for a good look rather than a certain IT. I'll post more as these progress today...I'm really interested in seeing whether the different rubs make a significant difference in flavor.