Fabtotum Personal Fabrikator
The magnets used are a bit weak - perhaps pick stronger magnets and modify model accordingly.
Holes came out a bit tight, needed to widen them with a drill. Would suggest to modify the model before printing for slightly wider holes.
I used Windows 10 3D Builder App, which I find surprisingly versatile and intuitive! Just do not merge objects - this breaks the file at some point.
The circuit and PCB I designed using KiCad - thanks to the authors for this powerful piece of software!