Heres my layout. I parted out my Brinkman smoker, it served me well but on to bigger and better. I used the grills for a firebox, handles and the door, the rest got tossed. I bought a couple of replacement Weber grills at Home Depot for the 22.5" grill. I also bought the thermometer at H.D. thats on my lid. All hardware is stainless, little pricey but no worry of toxic fumes. I put bolts at 13-20-30 inch from the bottom. I put the water/catch pan at the 13" when smoking. For grilling I use the water pan as a charcoal tray at the 20" level and move the other grate up to the 30" level. The ball valve is for air restriction to drop the heat. The wheels I just bolted to the bottom without any additional support. The vents in the lid are 1 1/4" pipe flanges witha 1 3/4 hole in the lid. I started with 1 vent and found out that the heat was not uniform so I added 2 more. If you put 1 in the center it would draw correctly. I didnt, so thats why theres 3. Live and learn, 3 vents actually works pretty good as you want the smoke to flow out of the smoker and not collect. And last pic is a swing out thermometer holder. I used velcro to hold the sending unit, the base is on my desk.