I don't have any pictures, but I basically emulated the approach taken by the the pitmaster ique series and used a 1qt stainless steel dog bowl, a long stainless bolt a couple of stainless fender washers and a stainless nut - I removed the factory vent control from my smokey joe silver and ran the bolt through a hole in the bolt, put a washer covering the inside of one of the vent holes & put the nut over that. The bowl completely covers all 4 of the vent holes, one of which is blocked by the washer, the rest are open. Originally I cut a hole into the side of the bowl that matched the size of the fan mouth and used a friction fit to hold it in place but have since that time added a servo valve for even more precise control over the airflow and had to redo the mounting hole in the bowl to match the 3/4" copper pipe I'm using for the servo... I tossed out the old bowl when I upgraded to the servo, so I can't go get pictures of that for you, but it was really pretty straightforward. There is a recent thread in the linkmeter forum here that shows a simple and cheap approach that is similar to what I did except it uses a tin can instead of the dog bowl.