You want the ash pan to sit off the floor of the drum so more heat radiates up instead of into the base of the drum. What I've read and if you think about it, it does makes sense. It's already built like that anyway. I'm going to do a test burn in a few minutes. I may or may not cut an inch off the feet depending on how things go. I'm also waiting on my dome thermometer but will just be using a candy thermometer today.