Killing flocks of birds with one stone

In which your narrator fits the last piece in the puzzle of how to use HDPE in 3D printing and accidentally discovers several other wonderful things for the holidays.

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These research notes are also in the wiki, for people who want to hack on the idea:
http://objects.reprap.org/wiki/Powder/Plastic

It's a wiki, so go crazy. (It takes 90 seconds to create an account and start editting.)