I picked up two 3.5lb boston butt roasts(bone in). I figured they would take about seven hours on the lg bge. I put them on at 10:30AM. They were placed two inches apart on the grill. I used the plate setter legs up and an aluminum foil pan with about 1" of water in it. I had probes in both roasts and one probe at grill level for grill temp. I maintained 250F grill temp the whole time. I finally got to 195F, in both roasts, at 12:30AM. In short they cooked like they were one(approx 14 hrs) 7lb roast. My question===Why. UPEgger.