Located all the rib positions on the leading and trailing edges.
Drilled all the 30 holes through the rib clip in to the spars.
Deburred all holes after drilling.
Installed all 12 ribs temporarily with clecos.
Riveted 10 ribs according to figure 05-06 and parts manual.
The root rib and number 2a rib will be riveted after installation of the fuel tank, like this one can still take the ribs out of the way when installing and riviting the fuel tank holding brackets, untill that moment I just use the clecos to keep the ribs in place.