"These are recumbent bicycles (tricycles, actually) made of square aluminum tubes, cut and drilled with hand tools any garage shop should have. No welding, no special framebuilding jigs or equipment. Uses standard bicycle cogs, wheels, brakes, etc available nearly anywhere."
- Open plans, distributed manufacturing strongly encouraged: http://www.n55.dk/MANUALS/SPACEFRAMEVEHICLES/DIY.pdf
- video: http://www.youtube.com/watch?v=CPaBOMBIfKA