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Ribs were fluted prior to being clecoed in place. I tried two tools to rivet the ribs. The photo above is riveting ribs in place using an Olympic Pop Riveter. Works easier than the PRP-26A but most builders do not have this tool. If you have a chance to pick up a used one take advantage of the opportunity, you will be glad you did.
I also used the PRP26-A. It does just as good a job as the Olympic riveter, it is a lot tougher on the hands.
With the ribs in place it's ready to start fitting the skins.
Both skins are the same so either can be left or right. I did this by myself but it would not hurt to have a second pair of hands (and cleco pliers). Once one side of the skin is clecoed in place the opposite side requires the use of an awl to line up the rib and skin holes for clecoing.
The hinges cost me a couple of weeks. I did not pay close attention to Van's instructions on using the drill guide turned in the correct direction. Study the plan to make sure the notches in the guide are in the correct direction for the hinge. The new hinge was not very expensive, but costs time waiting for the part.