Replaced Z on left side of access panel, which was damaged while drilling the holes for the panel screws. I had to cut another and move it about 2-3mm outboard so that there was room for the nutplates without hitting the upright/bend in the Z. This left the rivet holes a bit close to the edge nearest the cutout. To correct this, I installed several new rivets along the real centerline of the new Z, spaced evenly between the existing holes, avoiding interference with the nutplates. Installed and riveted the nutplates.