So this past weekend I did my first overnight smoke after I made some modifications to the vertical smoker I built. I've been going through a lot of trial and error with this smoker for the last couple years and I think I finally got it dialed in. I smoked 2 butts, a 9lb and 7lb, both went on at 10:00pm Saturday with temp at 245 degrees holding steady. I watched it until about midnight and went to bed, leaving it at 242 degrees. I woke up just before 8:00am and went out to check on things. A little nervous, as I had never left it alone that long, I was very happy to see it still running strong at 238 degrees, after over 8 hours! The 9lb butt came off around noon. Overall the smoker ran for 14 hours almost untouched on Stubb's charcoal with apple and mesquite chips mixed in and used less than 1lb of coal/hour. I just wanted to share this since I owe a lot of the knowledge I put in this smoker to the members here. Unfortunately I don't have an updated picture of the new vent set up...or a picture of the pork, which turned out great! but I just attached this for reference since it looks pretty much the same.