You should build plywood box that may not out-gas or melt if the flume smoke gets hot. Smoke must be entering from the bottom. It needs harder big bend in the tube to keep good smoke moving and keep sitting in stale smoke if anything in the smoker. It needs to raise the box up to 1/4 inch per foot on the pleanium. This will give you nice smooth smoke. Not only making a larger wood box you need to have lots of extra room to smoke more Bacon.