We keep hearing that the desktop computer is dying — everyone wants a mobile device like a laptop, a tablet, or a big horkin’ phone. We suppose [eponra] wants the same thing for 3D printers, since he’s provided plans for “flatpack” a portable 3D printer that can fit in a spool box.
As you might imagine, this isn’t going to give you maximum build volume. The printer’s folded down dimensions are 220x210x75mm. The build plate is fairly small at 120x114x144mm. However, it does have a heated bed and an LCD display. One note, though: you do need an external power supply that does not fit in the box. However, [eponra] notes that with an AC-powered bed, it would be possible to get everything in the box.