This replaces the stock storage rack connectors for a shoe rack. This shoe rack is great for storing filament, but the original connectors have too much flex and can collapse. These connectors remove that weakness.

Link to the shoe rack: https://www.amazon.com/gp/product/B0C3R6DYP7/ref=ppx_yo_dt_b_asin_title_o09_s01?ie=UTF8&th=1

I used two boxes of the shoe racks linked above to create the filament storage shown in the pictures. This will allow me to add more storage as needed.