Here is the reverse side:
For the long and short of what this is. I make 3D Printable e-reader cases that are held together by stitching cloth or leather. Up to now the cover had the magnet as a part of the design, but with no way to upgrade or change it out. This is my solution for that.
With 8 screws and a tight fit, the cover can be swapped out when you upgrade or change out your e-reader. That way you can keep the case itself and just upgrade the components you need when you need it.
Still testing it, but very happy with how it turned out.
Also, I don’t know for sure about other e-readers, but the Kobos I’ve had are not what one would call high-power-consumption devices; part of why the battery can last so long. I don’t really recall them heating up.