Gridfinity Rugged Box Modular Expandable Shelves

Change Log: 4/16/23: Added a parametric “Customizable” shelf option for those that want a different size or height than what exists in the available 3MF files. You can set the width, depth and height of the shelves in gridfinity units and it will generate a model with those dimensions for you. For the shelf width, set it to how many standard Gridfinity grid square (42mm) columns the box your putting in the shelf has, for shelf “Depth” set to how many standard Gridfinity grid square (42mm) rows your box has and finally, set the “Height” to how many Gridfinity “Units” (7mm) your box is tall. For the Top Shelf, there is no option to set height, only Width and Depth since, well, its the top! The model will add extra width, depth and height to accomadate the thickness of the box shell itself and 3.5mm of clearance in addition to space of the gridfinity interior. And as always, any suggestions for improvements are welcome! Happy modeling. 2/21/26: Added an optional vented Flat Top Shelf for