Bought 6" dampers,galvanized sheet metal which are really 5and 3/4 go figure. They had a so called key which I drilled out on drill press and was just bearing down, once it was at that point where just about through and it catches, you that done it know it threw that razor across the garage and broke the drill bit, thank God nobody was in that space.
Down in there from top, no top yet. Question is are the inlets going to do it, just drilling holes like a WSM. I think it will do the job. Face smoker so prevailing winds are on inlet sides North and south here. So whachta you think?