Clecoed flap frames together and drilled out to full size. Used a 6" long bit to drill the nose ribs. Got a neighbor, Ed, to help with the rolling of the flap skins at the leading edge. We rolled it with a 1.15 inch dia steel conduit. Duct taped the leading edge of the skin to the conduit and rotated the conduit over the skin using short pipes placed through holes as handles. Took two people cranking fairly hard, but less than 30 mins to do the job.