I created a new pipe for the 5015 fan.
It is printed without supports. On the triangular surface where the fan is mounted.

This one is with ball bearings. The flow is much better than with the original fan. The fan is at an angle. It should improve airflow.

I used new M3 screws, 8-10mm for holder, 22-25mm for fan. I heated one nut (or threaded insert) and put it in the prepared place. I will edit over time.

The fan is turned upwards so that it does not suck warm air from the bed.