My smoker is a 20” Diam. X 36” Wide side fire box, approximately 650 pounds, and I currently have it under the patio cover. We have a clay soil yard, and it is a beast to move. While I am planning to add a concrete pad to allow me to move it from under cover. We ain’t there yet. The wife is complaining about the smoke entering the soffit vents, and some inevitably enters the house. I wonder if I can rig a temporary vent extension, without affecting the draft. Any ideas would be welcome.