I have a charlgriller 5050 with sfb I know I know thin metal lot of leaks. But!!! I have spend over a year addressing all the loss of heat. I have used gasket material and have installed a convection plate bottom lined with fire brick so here is the question My FB gets to 800 degrees but the most I can get and maintain in the CC is 250-275 degrees.. I know that smoking is done at 225-235 and I can maintain that for like 2hours before I have to use more fuel .. What's happening to all that heat??? Is it just radiating their the metal? The 5050 has a 20 inch cc that's small so what's the story?