For some reason, the phaetus dragon hotend I use is too short for the original motor mount, I had to only use 1 screw to attach fans, they rode too high.
I raised the fan mounts up 7mm, all is good now. Posting in case it helps someone else.
V2: Lowered the bottom so the entire dragon heatsink is exposed to the fan, the frame was blocking it partially, causing oozing and stringing often.
The author remixed this model. Imported from Thingiverse.
Raised fan mounts to better fit Phaetus Dragon