Quote Originally Posted by RetroCreo View Post
You defeated the purpose of having an all metal hot end by wrapping it in teflon tape. The purpose of removing the ptfe tube with having an all metal hot end is to reach higher temperatures above 240*C. The tape will melt at higher temps and produce noxious gases.
The amount of tape he used isn't enough to create enough outgas to do any harm. That said it does negatively affect the way the filament melts and should not be needed. If installed correctly there should be no leakage.