I modified the E3D spider torture test to include a solid base with 3 embedded sockets for cylindrical magnets.

The magnet sockets should fit 6x3 mm neodymium magnets (6mm diameter, 3mm height). The sockets are slightly larger to allow for some wiggle room, so the magnets may rattle slightly in the sockets when completed. Place a small amount of glue in the sockets prior to inserting the magnets to avoid this.