admin 
Base design for everything the administrative fabricator prints
New printables in this module subtype this and declare only name, build_path, and a category if the default does not fit. Two constraints the CI unit tests enforce: RND_CATEGORY_INITIAL must stay in the category list or an autounlocking techweb will not pick the design up, and the material cost must not be empty, because a design with a build_path and no cost at all fails the design test. Nothing is charged in practice - the fabricator overrides build_efficiency() to zero.