it cuts down significantly on the heat and smoke "leakage".... I just fired it up for the second time and I'm loving how it's heating up
El Ropo got it... I welded a solid 1/4 inch x 10" plate along the bottom that provides a channel for the heat from the box, all the way to the opposite end. It comes out and then it's drawn back to the stack over the meat. Just finished second burn and wanted to keep it low... got it to 210 and held it there for 5 hrs on one basket of coals. The bottom rack toward the firebox is the "hot" spot, but the design is such that I can rotate the racks and shift them up and down depending on what I need at the time...
