I first put in the rivets on the baffle to ribs top and bottom only. Then I pulled rivets through the z-brackets. Then I put rivets in the two end rivets. At first I tried to squeeze them, but just using rivet gun and bucking bar worked better. I had an issue with the seam opening a little. Not sure why, but it closed. I had issue with one rivet that I had to drill out twice. Just bad technique. Then after all the baffle to rib rivets were done, I squeezed the perimeter flush rivets last.
