Picked up a 60 gallon Craftsman Compressor tank over the weekend. Sitting here watching the rain fall on it....thinking. Have not used any of the calculators yet. But I do have a question. Seen mentioned in several threads that in addition to the actual air inlets on the firebox door it is suggested that some air inlets are placed inline with the FB-CC inlet to aid in moving of heat & smoke. These vents are in addition to the actual air inlet vents, correct? If so, should they be the same size as the air inlet vents?