I designed the guide with intent on running spools along a shelf behind the printer but that also could guide spools along the upper gantry. im not sure if this would work with other printers but as i understand it these runout sensors are fairly universal. this uses the same bolt holes as the sensor and every upper surface has heavily rounded edges. print on its flat so the layer lines do not create any opposing friction.
also there are holes on top to slide unused filament but to have at the ready for changes. i find this is a much better workflow rather than trying to use clips or rethread the line back through the spool
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