I built my mini with a Smokey Joe Silver which has 1 pin wheel vent on the very bottom and one on top. The temp can stay steady for hours, but it can also get away. So much so that I would be afraid to leave it unmonitored for long. Has anyone found an Automatic Temperature Control that will work for this setup? Sorry if I missed an answer when I searched for this but I couldn't find anything that was specific to the home made mini.