I always use a heat sheild, especially late into the cook when the ribs, fatties, and all else butt a butt or brisket is left.
I save a ton of fuel using it.
Maybe you cut off the circulation too much Pimp. But keep trying using it, it really works.
I miss Big Al.
"Bitch..." - Jessie Pinkman
Bandera, M-BGE, WSM, Gold Kettle, Kenmore Gasser, 36Qt Turkey Fryer, ECB, Dutch Oven