Adjustable Magnetic Spool Holder

This is one-size fits all spool holder for 3D printer filament. Magnets sit inside the little feet of each bearing block, letting you reposition them to handle pretty-much any spool size. You'll need a thin steel plate, but you might be able to make something work in your nearby e-waste pile ;)

I loved the TUSH design, so I added a few features to make it generalizable, yet sturdy enough to hold pretty much any spool.

### Materials
* 12 magnets from VXB.com pn: D41SH
* 4 608-ZZ/C3 skate bearings
* 4 M5x20 screws
* 4 Nuts
* 1 thin steel plate from the scrap bin

Finally, if your magnets are slipping, you can cover the surface of your steel plate with grip tape or duct tape (or perhaps some thin rubber with a backing adhesive?) to make the surface more grippy.