Hydra Fan Cover

# Hydra Fan Cover for dual 5015 blower fans

### Concerns:
Airflow restriction is not a problem, I have run my printer for days without no heat creep issues. The many holes gives it good air throughput while hiding the internals from direct sight.

### Why make your own?
I wanted a cover for the Hydra Fan Duct that:
1. (Partially) Hides the internal wiring and Noctua fan color.
2. Protects the fan
3. Fitting together with
a. 40x10 fan and a front mounted BLTouch.
b. 40x20 fan.
4. Fits - no matter the height of the blower fans, since they can be mounted in different heights depending on the nozzle/blower angle.
5. Making my machine look just a bit more stylish while showing off the name of the totally awesome fan duct. :-)

### Hardware
- (Optional) Bracket used for BLTouch: https://www.thingiverse.com/thing:4617163
- The bracket uses 4 screws which is perfect with a Noctua fan, since it has extra height on the corners due to rubber added.
- 2 M4 screws (a