This is a remix from n00bz0rz modified for usage on the Graber i3.

The original holder was getting in the way of the X carriage so I designed a version to go on top of the printer.

Meant to be used with a 8x317mm smooth rod I took from the old version of the printer

You need to replace the screws on top with longer M3x24mm.

Better used with the quick change universal spool holder by Foreverwinter https://www.thingiverse.com/thing:1241566