That's very informative Bear 55. Thanks for sharing. I don't have an electric pellet smoker, though. I chose not to go that rout. Although most pellet burners have excellent reviews, I'd rather play with a real fire. To me, that's part of the fun. I've eaten ribs, and Tri-tip made on a pellet burner, but I thought the smoke flavor was much more subtle than the same cooked on a wood burning smoker, or even a Weber kettle.
I think I may be on to something about lining the cooking chamber with some type of heat absorbing material. It would lessen the amount of space the fire would need to heat, as well as retain some of the heat that the fire had already put out.