I designed this one to have a less noisy fan from the control box. The original one whistle too much.
So i removed the frid over the fan and designed a new cover.
I also reversed the fan, that blows air from inside to outside of the control box. The air flow is stronger in this way and the air come inside the control box from all around.
The resolution it is not very important.
To make the lid strong use at least 25% infill.