I've made this Z-Axis fan shroud for the right ventilation slits in the Fabrikator Mini V1.5. It is inspired by, and fits right beside, this X-Axis fan shroud, which can be added to the Fabrikator Mini V1.5 without drilling any new holes.
The (25mm) fan is angled by around 10degree in an attempt to reach the Z-Axis stepper motor. It seems to reduce the temperature a little.
Time-lapse of print process
I've already fought with angled parts in OpenSCAD before. This is the first time I'm using the polyhedron, which allows parameterizing the angle and still results in a more-or-less nice seam between the objects.