The portabee looks allot like the printbot jr. What I can’t figure out is how the heck these things stay lined-up…unless they don’t and each time you pack it up you have to reset it… I do like how the head it mounted to center its gravity more.
http://the-gadgeteer.com/2012/12/15/portabee-3d-printing-gets-cheaper-and-more-portable/