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This is another step towards "RepRap". Now to scale it up a little so it can build its own parts and it'll be one step closer. I do like Roseland1985 idea of PETG, though. It too will print without a heated bed and has better temperature stability than PLA. However, it may flex more, so, maybe not?
Now if we can only print metal, and semi-conductors and... :)

FYI, for fictional inspiration on the ultimate RepRap machines, check out the "We are Legion (We are Bob)", Bobiverse series of books.

Thanks for posting,