I found the original fan insufficient and it blocked the view of the hotend.
This asembly requires that you cut the M4 thread, so it goes all the way through the bearing block.
Bolt holes for the blower is tight enough in the print for the m4 screws cuts threads.
M3 screws and nuts to asemble the two parts
The fan is a standard 50x50x15mm 12v blower / radial fan
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