Just loaded my MES40 to the gills. 6 big racks of spares 2 lg. butts and a big packer brisket. around 54 lbs of meat. Used boiling water in the water pan and had minimal door open time . Temp. dropped over 100 degrees b4 it slowly started to recover. 245 when i opened the door, 210 when i closed the door and it dropped to 125 b4 it started to recover. now its up to 140 and SLOWLY climbing. i think i better not load this much meat in there again.