SummaryThis is my rendition of Schlotzz's Bowden extruder for 3D printing. I elected to modify his design a little. I added a thumb lever to the idler arm. I also knocked out a little bit of the tube areas so I could add a M4 nut to the tube to hold it in place instead of the typical PTFE tubing holder. The poor mans method! Please take a look. Enjoy - share! and of course all credit goes to Schlotzz for given me the original design! Thanks ~CoogInstructionsBe sure to run a 1.75-ish mm round tool through the PTFE that has been threaded by the M4 nut. This will re-open the passage so the filament can slip through it. I use a tiny flathead scewdriver that comes in a micro-screwdriver set for glasses. Just use one that is the right size. Then take a piece of your filament and slide it through with the nuts in place. If it moves freely then your safe. I also added a picture - although it is squished - of the four units I just made in preparation for the Kraken printhead I am mounting soon. Stay tuned for things that I designed and printed for the Kraken to be mounted on a standard Prusa i3 printer. See you all soon! ~Coog