Brand new to smoking. Just said hello through roll call. My huaband and I live in Garland, TX (Dallas). We received a little dry smoker for a wedding gift a few weeks ago. I'm assuming we need a firebox...? It's a very small smoker so there's no way we could cook on one side and have the heat on the other. And having low, indirect heat and smoke is what makes smoking, smoking correct? If we put the heat source in the chamber it will just be grilling? I'm attaching some pictures. Can we just buy a firebox and attach it?