With the rear spar finished, time to start on the front spar. This requires riveting the two spar stiffeners as well as the spar doublers to the left and right halves of the front spar. This is a critical area and is heavily fortified with a lot of rivets and structure which is further enhanced with the application of the spar doublers which come from compliance with a service bulletin for this area. As always I'm more comfortable setting rivets by squeezing them as opposed to driving them. All of the rivets on the top spart stiffener are able to be squeezed, I just used my hand squeezer although I managed to tip the very first one I tried to set, a bit rusty obviously. That's one to drill out. I squeezed as many of the other top set that I could and stopped when I got to the lip of the stiffener as it appeared that I would have to drive these rivets with the gun. I haven't done that in over a year so off to get in some much needed practice with the rivet gun first before I completely dork up this section. The third picture in this set shows my system for highlighting the drawings and plans to (hopefully) make sure I don't miss anything. Orange for parts callouts, pink for rivet callouts and green for tasks to be completed. This seems to really help when you're looking at one of the drawings and just need to find a part number or rivet callout.