Set the six rivets on each side that join the R-901 skins and the R-913 counterbalance skin and the three that join the rib, counterbalance skin and spar.Rivet on the R-903 tip rib. Use two blind rivets to rivet the top of the spar to the rib. Rivet the skin to the skeleton. Leave the last 3-4 rivets close to the trailing egde for accessing the wedge. These will be finished after bonding the components together.
