Not much time to work this morning, but I did get a couple of rivet done in the firewall. I have one that will need to be drilled out. Also the rivet callout is wrong on the corner rivets. It calls for -6 in one area and -7 in another, but the material is the same thickness. Also, the plans have you install the nutplates on two of the angles and that is bad because now the backrivet set doesn't clear the nutplate to get to the rivet below in several locations (see picture #1). It would be much easier to add the nutplates after the angles are riveted to the firewall. I will try to buck those that I can't backrivet. If that fails I'll drill out the nutplates.