Paste disk 1 on the back of disk 2, watching, against a light source, the two guide-lines matching (these two disks will become the double-face disk A).
Fold back the six edges of disk 5, after placing inside it disk 3 turned to disk 5 and disk A face 2 turned to disk 3.
Apply the glue drops (without splash) and paste disk 4 at disk 5 (matching the guide-dots), allowing the free rotation of internal disks 3 and A.