• Use the OpenSCAD file to create additional box sizes.
• Make sure the pins hold the boxes together snugly. If they don't, use the OpenSCAD file to adjust the model to fit your printer's tolerances
• Use the long pin to attach boxes to each other, and the short pin to cover the holes that don't attach to other boxes

Print instructions

Check first at which size you want to print the spice rack. Some boxes are very large, and will exceed the print size of a Prusa mini, or even a regular MK3S. Plan out how you want your spice rack to look, and then scale the boxes so the largest box you want still fits on your print bed, either using the OpenSCAD file, or by scaling all STLs by the same factor.