Ordered more Cherry Max blind rivets for inaccessible rivet areas by motor mounts. Riveted receptacles on all but two firewall flanges; extra receptacles and studs are ordered and enroute. Reamed holes out to size in opposing pairs, working down from top center. Inserted grommets and studs; adjusted receptacles and locked in place. Touched up edges of top cowl for clearance when needed as work progressed. Assembled cowling; nominal fit. Bottom corner holes will be reamed to size and grommets/studs fit once receptacles are in place.