Hi smoker gurus. Im building out a charcoal maze box for my smoker. The smoker is just a semi-old smoker off craigslist, new braunsfelds offset type. Id like for it to fit in the side door and leave the cooking grate in the firebox for potatoes and other items that need the heat. Here is what i have so far, welded up with some scrap pieces from the scrapyard. The dimensions are 10"x15"x5". That leaves room around the sides and room at the bottom for some feet to allow extra airflow. Im planning on having the maze run the long way, and if i have room, Id like to have a built in chimeney starter feature, so i can retire my weber starter. Put the box in with paper, light it and walk away. Comments or suggestions before I weld the rest up?