Simple spool holder for filament spools with a hole of approximately 5-6cm.
Source moved to http://shapedo.com/telepath/ampgt5cm_spool_holder_with_608_bearing
print 2 spool holders
insert a 608 bearing in each spool holder
insert the holders into the filament spool
push a 8mm threaded rod through the holders and fix it with nuts
hang the spool from the ceiling or into a stand