I have remixed @Greg191134 printhead for E3D Volcano.
Plus, I have made a place for the embedded bowden couplings to keep the PTFE fixed for the 4.1mm bore heatbreak.
I have printed the original face-plate for the regular V6 with fan attached and DuPont connector for it plus the heater and the thermostat , you can make one ready and hot-swap it between the volcano.
Generic ABS ABS
I have used a lot of strong hairspray to maintain adhesion and minimize warping.