Received the new AN6-44 bolt from ACS. Installtion of the the second main spar bolt went easily this time. The required washers, castle nuts and cotter pins were installed. Finally the rear spar bolts holes were drilled to final size and the bolts were installed with the required washers, castle nuts and cotter pins. The two doublers on the wings were trimmed to size and a rubber wing root seal bought from Van's Aircraft was cleco'd in place.