After partially cutting openings in cowl for oil cooler ventilation, fuel door and exhaust pipes to exit cowl, Lee Teicheira, Pete Mitchell, Frank Kelly and Bill Lawrence drill holes and cleco piano hinges in place.
RRY notes 2023: none of the cowl pieces are truly hinged. Piano hinges with removable pins are used to "zipper" sections together. Lee elected to use a mix of the plans scheme, which is almost exclusively piano hinge "zippers", and quarter turn cam locks. I prefer Southco fasteners, me, and I would NOT have used camlocks on the sides of the cowl at the firewall, but You Do You.