Just a quick question from the Summit owners. I did a search but couldn't really find a sure answer. After you get the Summit to the right operating temperature and you turn it down does the air controler have to be turned all the way down to low for the EBT to work or will it work at 1/4 or 1/8. I don't seem to get secondary burn for very long when I turn it to the lowest point but if I put it to the 1/8 point it works great.