12 in smoker tube.
Puts out so much smoke it doesn't mater whether it's below grate or on grate.
Cold smoked frozen ribs for 2 hours, then seasoned with yellow mustard & Fine Swine & Bovine.
Using HD foil as a heat shield . Using an old grilling pan upside down as a trivit to give space.
Cooker on lowest setting running about 250F