Well I did a butt last night, all was perfect, went to bed about 11:00pm, butt was happy at 130 degrees, dome was moving right a long at 275-300, hmmm a bit high, vents open more than they should, just a slight adjustment tighter to the normal 250 spots. Well it seems the 275-300 was not quite right, You see, cause I didnt. My glasses were in the truck, so I relied on 1 eye closed and the other open to read temps. It seems the Egg was right on target at 250-275, so I choked it. butt lost sometime over night. First loss in 3-4 year on an over night. The moral, use your glasses to read the damn dial fool!