Finished installing the lower angles for the instrument panel. I found that the best way to do this was to drill and countering the holes for the nut plates, then rivet the angles in place, then finally, to install the nutplates after. If I had installed the nutplates first, I think that they would have caused some problems getting access to rivet, especially on the vertical angles, because they are bent quite a bit more than 90* by doing it this way, I was able to access them with a squeezer, no problem. When I was disassembling the upper fuselage structure for deburring, i realized I had missed match drilling the 6 holes on each side that are common to the F-902 bulkhead and the F-7105B sub panel, so I went ahead and did that before I took it apart. Then I took a few minutes to make sure I hadn't missed anything else. There is a rivet common to the F-902 bulkhead and the upper longeron that's hadn't been installed yet. On drawing 23, when you're building the forward section, there is a note that tells you not to install this rivet until the sub panel structure is drilled. I don't know why, because it wasn't in the way or anything. I'm guessing that there's something on the tipper canopy that would cause this to be a problem, but on the slider, it wouldn't have been a problem to put that in when I was building the rest of the forward section. I installed that rivet on both sides. Took all the various pieces of the upper fuselage structure apart, deburred everything, smoothed all the bend radii with a jewelers file, and cleaned up all the edges. dimpled where required, and installed nutplates on everything. There were a couple of nutplates I left off for now because it looks like they would be in the way during skin riveting, so I will come back to them after the fact. Took quite a while to finish up, but everything is ready for final assembly with the exception of the F7108A. During the cleanup, I primed the F7108B angle due to it not being alclad, and I got the primer on pretty thick. It was so humid today that it's taking a long time to dry, so I'll let it dry over night and rivet together that sub assembly later. finished up the day by dimpling all the mating holes in the firewall using a dimple set in my 3X rivet gun.