I'm big into digital fabrication. Back when I started this project I had no idea how much effort and time and thought would go into these. It was worth it, though.

You can check out some detail on how everything was made (including some CAD files and diagrams) here: www.thingiverse.com/thing:3448

You can also find details on how the metal bits were made here: www.flickr.com/photos/gianteye/sets/72157619078382624/ and details on how the leather parts were prototyped here: makersmarket.com/seller/gianteye/blog