Thanks Duayne! on a smoker a small amount of turbulence in the cook chamber is a good thing, however I made the opening going into the exhaust transition bigger than needed to minimize any restriction at that point.DUAYNE B wrote: that looks like the tank i just got,,, that has a lot of volume, , how does the flow on the stack work, building alot of exhaust systems in my day, sharp lines tend to produce turbulents. but that doesnt nessasarily affect smoker exhaust flow. sure looks awesome