I smoked two 7 lb pork butts for the 4th. It took over 19 hours and I only reached an internal temp of 190! I was using an 18.5 WSM with a stoker attached (first long smoke with the stoker). The fire temp was a steady 210 for the entire smoke. The roasts stalled at 150 to 160 for over 5 hours and then the temps rose slowly over the next 7 hours. It has been my experience that after the stall the temps rise relatively quickly. It ended up great but really late. I estimated 10 to 11 hours for the smoke (90 minutes per pound of a single roast). So my question is where did I go wrong with my time estimate?