Cut up to the required measurements. Try using a white grease pencil to make the markings clear.
Use the drill machine to punch holes. You should have a rough design drawing of the stove and should also cater for the holes required for the thermometer.
Use the hole bit to make larger holes in the box for the air intake. Cut the individual pieces and then connect them together through riveting.
The area marked to make holes should not directly be done with a drill. Deepen them a little with the help of a chisel and a hammer then use a drill machine. This practice is done to avoid the drill from slipping.
Place three small bolts through the holed punched at the side. Secure these bolts with nuts.
On the mouth piece of the small mailbox, place a sheet of galvanized screen. You can use tin snips to cut the screen. Cut it in such a way that it fits perfectly on top of the mouth piece.
Locate the most appropriate place for air intake and punch a hole accordingly.
The lid of the mailbox can be made of tin sheets.
You will be needing steed rods. To cut them to the required size, use a hacksaw and then insert them in the holes that you have made on the sides.