Ultimaker Controller Board cooling cover

After i printed a lot improvement part for my Ultimaker and raised it's accuracy to a satisfying level i'm really happy with it now.
Anyhow i got bugged by this noisy fan on the bottom side of the Ultimaker.

You just need to switch the printer on and this fan starts screaming at you.


Because of this i started to work on a replacement. The first version was designed to replace just the fan and this plastic piece
but keep the wooden parts. After some tries i released that i will need to