I'm new to the forum although I've received the newsletter for quite some time. I've been smoking meat for a while but this is something I have not done yet. I'm smoking two 7.5 butts at the same time instead of one. I have a lot of experience with single items but when I smoke two at one time do I estimate the entire time as one 15 lb item or do I just estimate based on the heavier of the two (in this case I\they are the same). I will have them on two separate racks so they won't touch. Anyone out there have information on this?