So just throwing this out there. Has anyone tried the exhaust fan and motor out of a 6500? I checked the numbers and it looks like the 6500 had a better faster higher flowing fan set up. I am burning corn now with the cast iron pot, I can get about 7 hrs on number 2 before I need to clean the clinker. Also I wonder if I should have the damper out more I am out only about a half inch most times. I watched the Harman vid on here just now and wow what a fire dragon that looks like. Thanks.