This was modeled from official Corne Keyboard files on https://github.com/foostan/crkbd
Here you can find the plate for 21, 22 and 23 keys, bottom plate for sandwich build and official case already modeled.
You need only spacer to finish. You can mix encoder and keys on extra key's space (or 4 encoders!)
(remember to duplicate your model and mirror on X axis to print Left and Right, this is only right)
Enjoy your building
The author remixed this model.
3D modelling of plates