I've written a paper on the concept of a "Seed Factory", a starter set of equipment which can produce most of it's own parts as well as useful products:

http://en.wikibooks.org/wiki/User:Danielravennest/papers/Seed_Factories

It has developed out of a conceptual design study on advanced production ( http://en.wikibooks.org/wiki/Space_Transport_and_Engineering_Methods/Design_Studies_2 ) which is still ongoing.  The study considers a community of several hundred people and all the resource flows among it's various parts in order to determine things like what production technologies are needed to support the community.  This work has obvious relationship to the GVCS (in fact OSE was one of the inspirations for the study).  I would appreciate whatever comments people would have on the work.  Since I have not been active here for about a year, does anyone know if a similar resource analysis has been done for the GVCS 50, and where it might be found?