I was gonna smoke 6 butts, but the size issue arose and I couldn't use the third shelf. Just couldn't get the head room. I placed my digital therm in the butts on the lower rack. also at 12 hours when I added my apple juice spritz, I swapped racks and rotated the top to bottom.
Where width is an issue with the briskets(yes I use foil after brisket reaches 165 degrees
), height is the problem with the butts.
Also....Sam's has pork butts for $1.33 per pound if you buy in bulk, which is 8 butts. The box I got weighed in at 54 pounts and cost about $74. Thats a great deal in my book.