Magnetic Prusa Mini sheet holder

Designed this to keep my build sheets somewhere out of the way. I print on top of a metal 2-drawer filing cabinet and now I can keep up to 4 sheets out of the way but nearby. 

I printed with a 0.6mm nozzle, 0.3mm layer height, 0% infill and it turned out alright. a 0.4mm will work, it just takes a lot longer.

6x3mm magnets aren't quite press-fit, they'll need to be (super)glued into place. 16 seem to do the trick. but there's plenty of holes if you need more.