I couldn’t resist to this one. A magnetic field warning sign with a magnet in it for the magnet contest.

After all, with all the magnet models that we will print after the contest, we will need to warn people passing by that they may get stick to our walls ;)

To print, check in your slicer at which layer the inner magnet hole top layer is printed. Pause the printer one layer before that and drop the magnet inside.

You will need a 20x3 mm or 25x3.5 mm magnet. It must be rather strong.