The main part (i.e. the 👃 itself) includes a mounting slot for a Grove Multi-channel gas sensor. The back plate that allows to attach a 25mm fan and a Wio Terminal.
The STL files are made available under the terms of the Creative Commons Attribution 4.0 International License.
The original design for the nose, before I turned it into an actual enclosure, is from Stefan Potrovic (a.k.a. monochroma380) and can be found on SketchFab. A huge thanks to him for the original work, and for allowing me to publish the derivative work.