Amber- I have been reading the AOF thread,,To put it bluntly I have stack envy,,,I CANT turn my stack purpel no matter how hard I try,,and I do get some smoke after I fire,,my stack never gets real hot (dont have a thermometer) and I never get sap jumping out of the flue pan..or a real rolling boil within a foot of the stack in the flue pan. I would like to boil faster and have all the basic components to do air over fire,,,I did add an air tight front and that has helped alot,,,but I know I can-should get more heat from the wood I am useing (Marvin is pretty darn inefficiant)......If I could get another 10-25% out of the rig that would be a BIG PLUS!!! I also have to put that HUGE BLOWER outside...its very very loud,,,,,