Dimpled remaining holes in skin. Filed, sanded and primed notches in skin around rudder horn. Installed blobs of Permatex UltraBlue RTV compound to join trailing edges of stiffener pairs. Reassembled and clecoed skin and skeleton. Riveted skin to skeleton. Used squeezer for all these rivets. Left seven rivet holes in rudder horn brace until I can order LS4-3 blind rivets. (These appear to have been left out of the kit…)