Adapted from the Filament filters of both CreativeTools & sfernald. Just like the previous designs this uses a sponge to wipe dust and debris from the filament just before it enters the extruder. Major Update!! (03-05-2015) Connections available Recommend printing with a layer height of .15mm or less, with 30% infill or more. The hole in the male end 1.75mm tends to close up if printed too fast or without enough cooling. Hole is modeled @ 2.5 mm. If filament does not fit simply ream with a 2mm or 5/64" drill bit. Printing 2, or something else that is at least as tall, at the same time also will help. This allows previous layers to cool before building new ones. Original file still available for anyone that still wants it...