Twisty Rolling Filament Spool Holder

This is a rolling filament spool holder. It fits 1kg spools with its rollers in the outer positions, and small spools on its inner positions.

Print:

* 1x base

* 2x upright

* 2x roller

* 4x axle

Required hardware:

* 6x threaded inserts, M3x3mm (4-5mm depths ok)

* 6x socket-cap screws, M3x6mm

* 4x bearings, standard 608 size

Assembly: insert the axles into bearings first, then insert into roller tubes. These should friction-fit fine. Use a soldering iron to put the th