I created these 3d printed models to replace the usual GW transparent bases:https://www.thingiverse.com/thing:2607717
It has an inset at the top for a 1/4" magnet, which allows you to completely magnetize your drones without having to balance a magnet at the end of a stick.
FYI, I tried adding it to Shapeways, but it ended up being over $5/base. *BAD WORD DELETED* that. For the cost of outfitting your army with these, you could just buy a respectable 3D printer.