I live in Iowa on a farm and it tends to get windy especially in the winter and I am thinking about making a wooden cover for my Masterbuilt Sportsman Elite 40. My thoughts are just a simple "box" to go over it minus the front and bottom so the door can open and it can be slid on from behind. Has anyone tried something like this before? I didn't know how much of a gap I should leave from the smoker itself and the wood and if I should leave some clearance on the bottom so some airflow can go through. It would just be a simple 4 2x4's with plywood on the 2 sides and the back. Any thoughts?