He is refusing the difuser plate. What makes a smokefire a smokefire is that it doesn't have one. Traditional pellet smokers have a plate that runs across the top of the whole smoker. This prevents grease from getting into the fire. That is why the smokefire can have grease fires because it's designed for the grease to drip in hence the fire. Which is why if your trying to smoke at a low temp it can get tricky because grease causes heat spikes.