Thanks to Merkaba for the parts cooler.
When the 5015 fan runs at 50%, it cools better than the original fan, and not just from one side. I slimmed down the holder and put it closer and higher to the stepper. The fan connector is now horizontal. The fanduct is now tilted down a few degrees.
The front view is now better.
Halter2 for second screw on 5015 fan. In my opinion, the second screw is not necessary.
Assembly:
2x M3x6 with nut
1x M3x20 with nut
The author remixed this model.
Slimmed down and better visibility.