Assemble all 6 regular bins, 1 start bin, and 1 end bin by inserting 7 long hinge pins.
Use 14 hinge caps to lock the hinge pins in place.
Add 4 3mm x 6mm cylinder magnets to the start and end bins.
Slide the lock ring into the front core. Glue or bolt using 4 short M3 bolts.
Make sure the lid locks onto the front core easily. If it's too tight, loosen the lock ring.
Join the front core and back core. They are a tight fit, so glue should not be necessary.
Attach the bins to the core by sliding the core onto the start bin.
Roll the bins around the core.
Insert a ribbon of strip of velcro into the horizontal slot in the end bin. Use a flat screwdriver to push the ribbon/velcro in. Glue is usually not needed.