This is a version of bwevans "Mosaic Feet & Spool Holder", adapted to use M8 threaded rods and 608ZZ ball bearings.
The attached stl and scad files feature a slightly taller foot with a 8mm hole instead of 6mm.
Here is a short time lapse video of the spool holder in action: http://youtu.be/UQoSdxPS8tI
mosaic_feet.stl | 48.5KB | |
mosiac_feet.scad | 328.0B |