Hi, The image you see is the same model I recently bought. I already modified the charcoal grate, & today I received the damper controls, which is where my question comes in. I have 3 of the units & will put one on top. Since this unit doesn't have the extra 6-8 inches below the bottom of the door, I am not sure where to put the other 2 vents. Should I place them, one on each side, on the bottom section which houses the briquettes, or place them near the bottom of the heat chamber? Much thanks !