There is problem with Volcano + Titan Aero. Distance at the top is very small, screwing and unscrewing it real problem (to replace heat break with PTFE to full metal and back, for printing below and above 250, when PLA stains everything inside etc). For me finally solution was to cut recess in block so I can put cable from heater inside or even use block upside down And it was hard to find smaller 24V heaters, finally found 15mm length (still waiting, almost month for delivery). Standard 20mm on photo is too long for Volcano. My final goal is to have several assembled for different filaments for easy switching.