Customizable sliding word-switcher

This dishwasher CLEAN / DIRTY sign is a parametric model that can be customized to switch between any two text strings of the same length, such as COME IN / GO AWAY or BUSY / FREE. Examples are given in the OpenSCAD code and in the pictures.

This is my first design for my Prusa MK3S/MMU2S multi-color printer. I wanted something simple to start with, although the design evolved in complexity. The parts snap-fit together. While printing, only 6 color changes are needed, during the 2 layers of the faceplate when the text backing color is laid down.

The model includes pockets for three magnets. The STL file for the base accommodates 10mm dia x 3mm thick magnets, but you can customize the magnet pocket dimensions for any refrigerator magnets. This Thing needs strong magnets to overcome the 0.5mm gap imposed by the part. I used the small powerful magnets from discarded Sonicare toothbrush heads -- before throwing away the used toothbrush head I always use pliers to break out the little