I just completed my three tier system:ban:, and i am using two of the 23 tip burners for the HLT and Boil Kettle!
i am using 1/2 copper pipe for the fuel suppy! fed by a 3/4 pipe t'd to 1/2"
two questions: what distance from burner tip to kettle? i have them set @ 4" but it seems too close ...