Edit 2020-01-15: I accidentally uploaded the wrong file for part 3. I am really sorry everyone. I corrected the mistake.
A substantial remix of Domi1988's work.
Changes I have made:
Increased height adjustability
Improved airflow for fast printing! Especially suitable for powerful 5015 radial fans. Air is directed at a very broad region below the nozzle, greatly increasing the time the hot plastic is exposed to the part cooling fan.
kulfürst
