Jig set up for the pneumatic riveter and special flush rivet tool (Cleaveland Tool) set the trailing edge rivets in 4 stages of setting (light touch just enough to hold into hole, 1/32 more, 1/32 more, then final seat), initial squeeze was on the centermost rivet, then #10 left, #20 left, #10 right #20 right, then #5 L-R, #15 L-R, then marked remaining A-B-C-D. Pneumatic riveter was on a caster cart, thus able to roll left and right without disturbing position of trailing edge.