Back riveted the stiffeners to the top skin. It was much easier with Dad's help holding the skin flat while I riveted. Then we inserted the spar into the skin and scratched our heads on how we were going to rivet the spar to the top skin. Squeezed the ones we could reach, and then bucked the rest. I held the bucking bar while Dad used the gun. First time I've had help bucking rivets and I was amazed on how much easier it is. Now I'm spoiled.
