I have 2 butts on the 18.5 WSM together the are 19 lbs. Smoker is at 266°F one butt is at 81°F not to bad for 40°F weather. I say one butt because I only have one Maverick at the moment. The temps tonight might make me bring butts in the house to finish cooking. Q-view to come I have tooken a few pics so far.