I've owned a Char-griller Pro smoker with the firebox for a couple years now. Have turned out some great BBQ but have always had a tougher time of keeping it at a constant temp. A few weeks ago I was browsing our local Menards and saw some 1 1/2 X 8 x 4 inch paver stones and thought about using them in the smoker to provide thermal mass. They were easy to trim and fit beautifully. I had always used the charcoal pan turned upside down as a way to spread the heat more evenly along the smoker box . Before I needed to fill the gap between the smoker box and the pan with foil. Now with the bricks installed the pan fits the cutout perfectly. I have my chimney extension setup as a cross flow so the neat and smoke travels under the pan and then up and over the meat to exit. We used this setup every day over the recent holiday weekend and it works great. Holds the heat for hours. Before whenever we opened the lid the temp would dsrop like a rock and take quite a while to recover. Now it's hardly noticable. The pavers were on sale for the amazing price of 20 cents a stone so I bought 100. But now I see they are back up to 50 cents. Please excuse my filthy grill in the pictures. I took it apart to clean it and replace the top stone that was cut short. What do you guys think?