I decided to build the right wing first. My decision was based on simplicity. There is less stuff in the right wing. Building the skeleton was very easy. Just a lot of time was spent on measuring and checking measurements. Fixturing is everything when building the wing. There was a slight crown in the wing spar. Less than a millimeter in the middle. It is within specifications. The Spar, rear channel and rear ribs are riveted and the nose ribs are only clecoed in place.