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Carefully position the rod and bracket so that the bracket can be secured to the inside opening of the firebox with two screws. See Figure 16. Do not remove vise grips at this time. 5. Working from the side cutout opening, place the slightly opened air door assembly into the cutout opening as shown in Figure 17. 6. While holding the door assembly in your left hand, grasp the vise grip (attached to the long control rod). Rotate and move the control rod around until the inside end of the rod is ma