Spool Holder for Prusa I3

Spool holder For 8 mm threaded rod.
Holders are attached with 4 mm bolts/nuts as shown in picture.

Guides will fit spools with a inner diameter of 32/39/52 mm
and fastened with a spool clamp on each side for easy
spool switching.

The guiders can if you like be fitted with 608zz bearing
after expanding the center hole to 10 mm .
It can then be fitted with a printed spool-bushing.

Everything else is up to your imagination.