Riveting continued with the rear spar. I did all the rivets with the pneumatic squeezer, and I was very happy with the results. This step requires a good understanding of all the notes and rivet schedule details in the plans. For example, several holes are left open (covered with tape to prevent accidental riveting), and the AN70 rivets were installed with the manufactured head on the aft surface (normally the manufactured head is on the side with the thinner material). With the rear spar complete, I moved on to the final assembly of the forward spar and ribs. I cleco'd the spar and ribs together, and managed to set the rivets for the center rib and tip rib with the pneumatic squeezer. Unfortunately, the squeezer will not work for the root rib and nose rib, so I had to get out the rivet gun and bucking bar for the first time. I did a few practice rivets on a scrap piece of aluminum, and then moved on to the actually vertical spar assembly. The 1/8” cupped set and tungsten bucking bar worked perfectly on the AN470 rivets, and I could breathe a huge sigh of relief knowing that my first 3 bucked rivets turned out great!