I noticed a lot of folks talk about not being able to maintain temps on the master forge (or Brinkmann) and also noticed those posts tend to be in the colder months. If your thin-walled smoker is in the summertime air and sun, you'll struggle with gaining temps...if it is in the colder months (as in Thanksgiving and Christmas seasons, when smoked meats really hit the spot!) you'll be struggling to keep up the temps. I came up with a quickie fix a few years ago that has worked famously, and compares to the insulation values of such as the "Big Green Egg" etc. Go to any big box hardware store, and buy a 4x8 sheet of aluminum faced, 1 1/2 to 2 inch rigid insulation. Cut it to make a surround sized to your liking, using duct tape to "hinge" the whole thing, and use it as a wind break. It reflects heat back to the smoker in the winter, and stops the wind from sucking your heat away. In the summer, you don't need to use it, but if you did, you could use far less charcoal. Use a piece of plywood for a lid, put on some relatively light weights on the corners if its windy, and it works like a dream. (Just don't get the material too close to the smoker, because the rigid foam can melt.