So I am still breaking in my new GMG JB. This was me 2nd smoke on it today. I did 2 racks of pork ribs from Costco using 3-2-1 method. While inspecting the ribs after unpacking them, I discovered the underside had no rub what so ever. I spread a little mustard and dusted lightly with a commercial BBQ rub. I am glad I checked! Wife said these were the best ribs she ever tasted. The rack on the lower bottom was glazed with Blue's Hogs Original and the rack on top was left dry. Wife is not a fan of BBQ sauce. I also had some leftover Costco Mac & Cheese so I smoked it too. Came out great and I mixed in some Frank's Hot Sauce to spice it up.