My sample shipment of mini magnets came through. I intend to use them in order to have magnetized tank turrets. They don't fall off and they turn really smoothly. Put the first pair in, which wasn't easy. I really have to get a non-magnetic pincet, and a new drill that makes clean 2mm holes, because the one I have now is not in good shape.
Therer definitely is some technique involved in mounting the magnets: do it the wrong way and before you know it you have magnets covered in superglue flying around.