Wargame mini magnetic bases (for Warhammer The Old World etc)

Bases for miniatures with slots for 5x2mm magnets. Magnets should just press-fit, but you can also add a dab of superglue to be sure they won't fall out.

You can then transport your minis in steel toolboxes, or homemade magnetised cases made by sticking some ferrous rubber sheet in a plastic box: https://www.youtube.com/watch?v=BZOcwWxAOg4If (just use ferrous sheets rather than magnetised ones, and magnetise just the minis, not the case, otherwise you'll have to worry about polarity). If you use an existing base to check for polarity before mounting the magnet(s), they'll also be easily stackable. Print them upside down on the build plate, no supports needed. A variety of different sizes for different troop types:

25mm round
25x25mm
25x50mm
30x30mm
30x60mm
40x40mm
40x60mm
50x50mm
50x75mm
50x100mm
60x100mm
100x150mm