Time to button this thing up. I have already riveted the back skin onto the middle spar. I am now doing the same with the forward skin. It gets a little tight here...you have to reach your hand inside between the skin and the spars in order to buck the rivets. Riveting the skins on would have been easier with two people. But my ace riveting partner, the lovely and talented Connie (my wife) was out of town for the weekend and I couldn't wait to get this together. (What? You riveted this alone? Are you out of your bucking mind?)