3mm Vapor Coil Jig

thingiverse

This is a clever trick to craft the perfect coil. Instructions: After printing your trick you'll need to locate a 3mm diameter rod that's 30mm long. I used a nail that was drilled out with a drill bit, then polished with fine-grit sandpaper until it was silky smooth. Next, insert the rod into the hole, heat up the rear end of the rod, and push it in just a little way into your trick. Finally, take a small amount of extra filament, heat it up, and fill in the back end of the hole.