Fully 3D printed assortment cases replace heavy hardware storage

Building a custom machine requires more than just high-end components; it demands an organized workspace. Moving beyond flimsy plastic bins, this project focuses on creating a fully 3D printed assortment case system designed to house the Modbox grid. By eliminating metal hinges and store-bought latches, you gain the ability to customize every millimeter of your storage to fit specific hardware, from tiny M3 screws to bulky cable extensions. The goal is a durable, snap-together solution that feels as premium as the equipment it stores.

Engineering a satisfying snap-in lock

The most difficult part of a fully printed case is the locking mechanism. Standard latches often rely on metal pins, but a truly DIY solution requires a plastic-compliant design. Through five major iterations, the lock was refined to provide a tactile "click" that secures the lid without risking accidental spills. This snap-in-place design uses the natural elasticity of filaments like PETG or PLA+ to create tension, ensuring the case stays shut even when tossed into a toolbag.

Scaling the frame for heavy hardware

While a small case is easy to print, scaling up to a 7x6 grid requires structural integrity. The frame utilizes a reinforced grid system that acts as the backbone for the entire unit. By designing the cases in six different heights, you can accommodate everything from low-profile washers to tall capacitors. Each case integrates a dedicated label slot and an ergonomic handle, making it a professional-grade alternative to commercial storage. The final assembly involves mating the lid to the frame using printed pins, resulting in a surprisingly strong unit that defies the reputation of 3D printed parts being brittle.

Optimization and final assembly

To achieve the best results, print the latch components with high wall counts to prevent snap-off during use. Once the frame and lid are off the bed, assembly is a straightforward process of alignment and press-fitting the joints. The system scales from a compact 4x2 1H size up to the massive 7x6 variants, allowing for a uniform aesthetic across your entire workbench. Once assembled, these cases provide a rigid, organized environment that keeps your build components exactly where you left them.