After seeing photos of someone who burned up their fan shroud due to something being faulty during installation, I would like to suggest that you change your documentation a bit to the following: 1. Get the metal components assembled. 2. Attach the wiring. 3. Turn up the temp. 4. Validate temps. 5. Tighten parts as per spec. 6. Turn off everything and let cool. 7. Attach fan shroud. 8. Install on printer's effector. 9. Turn on host software to heat up hot end to 190C. 10. Check temps with a multimeter/temp probe or a heat gun.