Originally posted by Faceplant8:

Why do you need double stone walls

To answer that
Next testbuild (i trashed the idea of a upgradeable base, its just impossible)
https://steamcommunity.com/sharedfiles/filedetails/?id=2624208827
https://steamcommunity.com/sharedfiles/filedetails/?id=2624208851
https://steamcommunity.com/sharedfiles/filedetails/?id=2624208871
https://steamcommunity.com/sharedfiles/filedetails/?id=2624210885