Over the weekend I made a fair bit of progress riveting the outboard skin section onto the left wing. The rear spar and main spar are now riveted to the skin, and I tried to use the back-riveting method when I could. However, it looks like I'd need a longer double-offset backriveting set in order to finish the rib rivets, so I'll probably end up bucking those normally for now. What's next? Finish bucking the remaining rivets that are still under the blue tape. Then start adding the J-channel to this side...