Today, step 4 23iS / U-07 was carried out, in which countersink 120 was made to the drill holes of piece F-1270D that used flush rivets to make F-1270D-L & -R. Also, step 8 24iS / U-02 was carried out in which countersink was made to holes # 30 in the outer flanges of the F-1231A-FL. FR, -AL and -AR for the rives that will eventually latch underneath the canopy.
