Guard for Creality K1's side fan

This is a quick-to-print guard for the Creality K1's side fan, a 120mm radial fan that blows a massive amount of cooling onto the print.

Someone complained of having their failed part fall into and break the fan, which inspired me to prevent it happening to myself and others.

Included is the FreeCad source for it.

Print in PLA, slide the pins into three of the fan holes.  It's secure enough in my experience, but you can change the design to have longer legs for some more security.

Update: I've changed the design slightly after one of the filament purge threads got sucked in.  Hopefully the angled slats will help with that.