Began with the right lower outboard wing skin. Clecoed the skin to the ribs, main & rear spar. The holes in the main spar didn’t line up real well, so I removed all the clecoes and started again. This time I clecoed the main spar first and worked up the ribs to the rear spar—holes lined up much better. Riveted the skin to the rear spar in the first bay, then started in the middle of the first rib and riveted each direction. Got 15 rivets shot, will have to remove one which clubbed over. A bit of a slow process bucking rivets with such limited access.