Step 2: Make the burner box
Using 3/8 inch tubing, make two hinge pivots ant are 1/4 inch wide. Flatten one side with a file than braze to the side near the opening that was cut.
Cut a small section of 3/4 inch tubing that is about 1/4 inch wider than the the section that is cut out of the body tubing. Curve this to match the curve of the body.
Placethe 3/4 inch tubing over the opening of the body and mark the perimeter and index one side.