Finished up the left wing skin riveting. I used the small rubber tubing to force the tab on the rib down against the spar so it could be riveted (see previous post). Next I squeezed the 9 rivets that join the wing skin to the flap brace—did this on both left and right wing. Only item remaining is to rivet in the pitot mast to the left wing skin and main spar.
Rivet and rubber tube used to hold tab on rib against spar
Squeezed 9 rivets per side to join skin and flap brace