@infiniteloop No, I didn’t touch the heatbreak as this is a Revo nozzle there is no PTFE tube inside just the nozzle tightened all the way in into the Roto extruder. The PTFE tube coming from the top barely gets inside the assembly without reaching the hobbed gears.
@elmoret it is a nozzle from the early beta testing of the revo system when those were shipped without sock, so, for your point, it is genuine. There is no air path blocked aside from the front where the toolboard is supposed to be installed and the back for the mounting system, did you mean that?