TEVO Flash Tarantula Heat sink fan adapter to use a 40x10mm 12V standard fan
on an original hotend duct.
I use the Noctua NF-A4x10 FLX fan with a
mini step-down module (Size:22x17x4mm) like this https://ebay.us/pttDIo
To mount the adapter you can use the original srews
but instead of the old fan you need 4 distance tubes 10mm or
this adapter from "Darkronight" https://www.thingiverse.com/thing:3798250
The frame holds tightly to the base and normally does not require any further fixing.
PLA or PETG
Support only at the frame in the step-down module section