Attached the right flap and right leading edge skin for riveting to the bottom of the right wing. Leading edge skin was uneventful. Attaching the flap this early in the build was new to me, but great advice from the Zenith Builders site explained how I can easily remove and reinsert the ~7 foot piano hinge pin using a power drill. So after riveting the flap (and the rest of the trailing edge), I pulled the hinge pin and set the flap aside for storage.
Wing, upside down, with leading edge skin and flap attached. Ready for riveting.