Add-ons » WALL RACKS
Add-ons » KALLAX-COMPATIBLE
Add-ons » BILLY-COMPATIBLE
Add-ons » ACCESSORIES
Add-ons » SWATCH RAILS
Add-ons » EXTERIOR
Add-ons » ZONES (FOR BACKER BUILDING CUSTOM RACKS)
Add-ons » STORAGE COMPONENTS
Use these to fill any. "STORAGE" racks/zones you may have added to your pledge.
Here is a video that explains how these work: