I have had my 18.5 WSM since May and have enjoyed it very much. I still have some difficulty controlling the temperature. It seems that every few minutes I need to adjust the vents to either lower the temp or to bring it back up. The time I'm expecting for what I'm smoking is much shorter than I have expected. I am using a clay saucer over a Brinkman water pan. I have tried to let the temp of the WSM adjust itself before putting the meat on. I'm using Stubb's charcoal which is fantastic. I will use up my Kingsford when I'm grilling some items on my OTG. Is there something that I am overlooking when controlling the temp on my WSM?