Spool Bearing Holder

I wanted a holder for my filament spools while printing. This design is to use as few non-printed parts as possible - so much so that the only metal parts are the bearings used.

**Print:**
2 x skids
4 x axles

**None printed parts:**
4 x 688ZZ Bearings (8 x 16 x 5mm)

***Optional:***
8 x 6mm self rubber feet - to help stop them moving around.