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Dual/Double Filament Spoolholder with Skaterbearings for 4040 extrusion

I needed to mount 4 spools on a 4040 extrusion and did not find anthing to my liking, so i shamelessly remixed this spoolholder as it was fitting for my 1kg spools (70mm) - other bearing spoolholder are too broad - and could be easily…