Tonight I layed out the right main spar and inserted all of the rivets into the spar caps. This time was much easier than the left main spar because I didn't clamp them together until I had all of the rivets in. On the left spar, I ended up reaming out a bunch (almost all) of the rivet holes in the cap strips because the rivets wouldn't go in all the way. This way was MUCH smoother!