Customizable cuff experiment

Just having some fun experimenting with http://www.thingiverse.com/thing:53453 trying to make it print without any support, fit the key and allowing different sizes. It will likely work better in smaller size, you can use slicer to resize it further.

This is based on fastkite's excellent customizable cuffs & collar, however the original had a distinct disadvantage for me in that it needs support material to build. To attempt to fix that, I'm building the hinge closed, so it's self-supporting. NOTE this requires a priinter with good tolerances and calibration so the hinges don't stick to each other. To aid with this, the expected tolerance has been exposed to the customizer as Hinge_Play.

Another nod for printing without support is the addition of slight slope on the underside of the "attachment loops" optional on both sides of the bracelet. This slope is only on the underside, not on the top side since support isn't needed there. Additionally, the hinge holes on the open side hav