This upgrade is designed to keep the filament organized in the print area.
The filament is guided through a tube so it does not roll back to the barrel as the extruder moves closer towards it. Additionally no short sample will curl around the print head as it is solidly guided inside the tube.
Works only with 1.75mm filament.
Also acts as a FLEX UPGRADE for the stock extruder, as the extruderplate is completely replaced with a version that guides the filament deep down into the hotend.
You will need 4 screws (4mm) with matching nuts and a length of at least 30mm.
Infill can be varied but shouldn't make much of a difference
Widening the hole in the extruder plate
It is necessary to drill the small hole in the extruder plate a little more. Beware: The bigger the hole, the easier the filament swap, but soft and flexilble materials might be too lose. Drilling 2.5mm worked nice for me.
Inserting the brass tube connector into the cylinder
The brass connector has a conical thread that needs to cut its way into the cylinder it will be connected to. Use a good amount of force and a wrench to lock it firmly in there.
Set up the tube system
Please note that the cylindrical parts are named "...inputside" and "...outputside". That means the filament can be guided into the tube or out of it better. If you place them at the incorrect end, the filament will most likely get stuck when trying to exit the tube.