Prusa MK2s 5cm front extruder fan

Prusa MK2S front extruder mod for 50mm fan.
As a base I used original downloadable model from prusa site.

I printed it in PLA, but now I am not sure if it is not a bit of a firehazard :D
But till now nothing happned, already printed tens of hours with it without anything melting or deforming.