Tonight, I clecoed, countersunk, and riveted the F-721B side rails, F-757 gussets, F-721A canopy decks to the F-718 longerons. I used masking tape to protect the parts and it turned out really sharp. The blue anodized surfaces look really good and should last a long time.
I will need to borrow some small flush pulled rivets from Gerry for the two rivets that connect the F-721B's to F-721A's.