¡Está bueno!

I have a concern with the waste moving from the higher screened tunnels to the paper and the carbon.
I would consider a single level idea or more carbon paper waste containers at the other levels near the tunnels.

La ropa es muy buena.

Los ratones will grab this in zero g.

I would use pressurized water container, no higher than 30 psig instead of a water pump to keep it simpler.

What is the main frame material you are using?

What are the walls made of?

Pero ¡es muy bueno!