Today I tested the elevator trim tab servo with a 9V battery and then reinstalled the servo back into the elevator. I fabricated the coverplate for the access hole in the bottom of the elevator and clecoed in place. Next I marked the center of the panio hinge and lined it up on the elevator and marked the rivet spacing making sure to leave the 'No Rivet Zone ' in the center between the ribs. I drilled and clecoed the hinge in place and began work on the control horns. I marked and cutout the holes for the horm doubler in both the top and bottom of the elevator skin. I also installed the L'angle on the inside front of the elevator.