Made SNB-W04-06R/L hinge halves. Drilled #40 pilot holes in hinges with metal yardstick hinge drilling template.
Made SNB-W04-05R/L aileron drive rib assemblies. Drilled #40 pilot holes for initial assembly. Updrilled #40 pilot holes to #30 rivet holes. Dissasembled, debured, reassembled and riveted both drive rib assemblies.
Drilling #40 pilot holes in the aileron hinges.
Drilling #40 pilot holes to assemble the aileron drive ribs.