This isn't my design Buckaroo.I saw it on another cooker and thought the same thing you did. The caps are welded to a piece of 1/2" all thread which runs through a nut welded on a plate that is welded on the inside of the pipe. Just screw it in or out according to the desired intake.lostbuckaroo wrote:This is an awesome intake design! Do you mind if I use it!? How does it work? I've got a smaller patio build going and been looking for a different fresh air intake designgatewood iron wrote: