Low friction spool holder that fits in the UM2go carry case while holding a spool. Helps with feeding issues.Also fits UM2 and UM2 extended.Based on https://www.youmagine.com/designs/low-friction-um2-spoolholder
Technical
2 x 608 bearings
1 x M8 x 60mm cap screw or bolt
1 x M8 nut
You can use a piece of M8 threaded rod about 80mm long with 2 nuts.