Thanks for the link... Interesting concept with the two baffles. I started using one on my cooks, just using a simple pizza pan with holes in it. Found a larger 16" pan w/ bigger holes that I'm going to modify slightly and try out. I do like using a diffuser, as my meats are more evenly cooked, especially when cooking more than one piece that you can't center over the heat.
Only draw back I've found is it takes a little longer to cook, and use a little more fuel, but for me the end results are well worth it.