Thanks for creating and sharing this very useful design Steamkraft!
Was having difficulty installing the Noctua fan screws. Decided to use hot glue to hold it in place and seal any air leakage out of the sides since the fan was already a tight fit.
Make sure to use the 5V Noctua fan.
This upgrade was well worth the effort as it's like having a completely different machine from a dB level. So quiet now.