Test # 4 - 15" Pizza Stone
I didn't realize how much charcoal I was going to use. So, before this test I had to pull the firebasket out and re-fill it and light another chimney. Of course I spilled most of the ash in the drum in the process... and I think I was a bit impatient with the charcoal in the chimney, because it took a while to get the drum back up to 300*. The stone was in there for a good 20 - 30 minutes to get preheated.
Start 4:25 pm
Outside temp = 290*
Outside temp = 295* after 25 minutes
Middle temp = 265* after 5 minutes
Middle temp = 306 after 25 minutes
Cook time = 30 minutes
This one seemed to be the most even. But, the outside was still a little darker.
I think I like the pizza stone or ECB pan. There will have to be more testing. I think the weather will make a difference. I saw the side temp drop pretty dramatically every time I opened the lid. Much more so than when it was warm outside. I'm not sure my temp probe in the middle was as accurate as it could have been, because it was wired tight to the mesh grate.