Printed Template for DIY Hotend

I designed a hotend you can make from a template.

Print out the template, wrap it around a metal rod, and drill anywhere you see a hole. The design uses a bowden cable as an isolator, so only the metal part requires drilling. Detailed instructions can be found here.

I've been using the hotend for maybe two weeks now and it still works great. The small width of the bowden cable means there's less thermal conductance, so it makes a good isolator. I don't use a fan, and I still thermal creep is not an issue. I did notice it works better though if the bowden cable is cold when you screw it in - when it heats up, the teflon expands faster than the metal, so inserting it cold will make a firm grip when the nozzle is hot, resulting in fewer leaks.