My smoker came with a crappy thermometer, it want to swap it out. The hole they drilled to put it in is 2 inches. How do I replace this? All the replacement I find have a much smaller hole. I tried putting a washer on the back but it does not close the gaps. The washer is flat and the smoker is round. How do I replace my thermometer? Any tips? It is a charbroil double chief. The one in my profile pic.