Merten blind plate and button plate
thingiverse
This is a blank slate for adding your own components behind it. Feel free to drill or use software to create holes for lights, sensors, pushbuttons. If you have a capable slicer, try partially filling the spring holders with 100% material. I personally use Cura, but it's not designed for that feature. The other version is equipped with holes for a board featuring 12mm pushbuttons and small slots for spring wire. Instead of using wire, consider using a small piece of chewing gum or something similar to secure the components in place.
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