I finished up riveting the center skin on the bottom of the left wing, I use every hole when clecoing skin in place but I'm finding it's easier to insert the rivets into the holes if a couple of adjacent clecoes are removed. I encountered no problems and checked the underside to be certain that things were as they should be. Patrick will stop by on Friday to flip the wing over for topside work. He's picking up a check for the loan I'm giving him and Mindy for their house.