According the Day 4 of the smoking course, Jeff recomends installing a baffle on my offset in order to keep heat even, not torch the near stuff, and be able to cook to far end stuff properly. I have the attached (pic)smoker. Pretty standard offset. Any suggestions on how to make and insert a baffle? Materials? how to attach it?..any insight would be very helpful. For the ribs in the picture below, I had to rotate the placement on an hourly basis. They came out great...but I would like to even it out and keep the door closed longer.