Here we have a collection of items with the the Assembly Manuals and/or Instructions.

Colossus Storage
IKEA Kallax Compatible

TITAN Storage Modules

Modular Painting Station

Vertical Paint Storage

Dice Towers

Deck Holders & Discard Piles

Portable Paint Station with modular shelves and storage

Eldritch Horror Insert/Organizer

Vertical and wall mount brush Holders

War Trays and Tournament Trays