Used a marker to number the reiveting sequence on the left and right elevators. Same concept of starting with one on the left edge, next the right edge, next the center, and continually splitting the difference until all the holes are riveted. This was acheived by taping the rivets in and back-rivetting (half way) and then finishing off the rivets with the flat set on the rivet hammer. It's such a relief when you finish if you can hold them up and sight down a perfectly straight trailing edge. Prepped the elevator gusset for riveting.
Using back-rivet technique to half-set the trailing edge, prior to finishing off with flush set in gun