From the lolls of that brisket- ur smoker is fine. Ace Hardware has flat self adhering flat stove gasket for about $7-8/ 10' strip. Harbor freight has the pressure toggle clamps for $5-6/ each. The gasket works great, gotta get the clamps still- here's mine and I've only had it about a month. During the cure/ seasoning it Only smokes out the stack.