Bronco- you will need to pay attention to the distance between your fire and your lower rack, especially if you have 12" of lump with a chimney dump on top. You will also find a fair temp difference between your thermo and the temp on the upper rack. What spacing do you have under the basket?
I've got the feeling you will be building more and you will find that you don't need the intakes spaced around the barrel but can have two at the front or better yet- one large one at the front.
Great job on that lid!