by fractaldesign, published
Derivative of OpenDesign's Open Invitation project: http://www.thingiverse.com/thing:34077
Item: Seat Pan / Back Rest
Material: 12mm Plywood
Machine: Shopbot CNC
I guess the idea is that you cut out a s*&^t ton of these little knuckles, and join them together with threaded rod/bolting system you have defined for the knuckle.