3KG Filament Spool Holder

Modification of k014's universal spool holder to more comfortably hold larger 3KG spools, WILL NOT FIT MOST TYPICAL 1KG SPOOLS.  Compatible with his wheel covers and stands.

Parts needed: 608 Bearing, specific dimensions here: https://www.mcmaster.com/5972k501

Modified to be longer (150mm between bearing centers), so large 3KG spools can sit lower.  Fits 2 large spools inside Sterilite 32Qt gasket box, with room for a 3rd 1KG spool.  Tested to fit Polymaker and Overture 3KG spools.  May fit 2KG spools, but have none to test with.