Required Hardware

You’ll need a few things that are not 3d printable.

Required:
– Strong (100lb) braided fishing line
(http://www.amazon.com/gp/product/B009661Y72)
– 1mm Elastic cord
(http://www.amazon.com/gp/product/B0047BIRUS)

Strongly Encouraged:
– Metal knuckle pins
(http://www.ebay.com/itm/311168002311)

If you cannot get the metal pins, there are two alternatives. Nearly as good, you can use 2mm aluminum wire, like this: http://www.amazon.com/gp/product/B003LTGS4E It’s quite soft, so I carefully straighten it with parallel-jaw pliers after cutting.
If you’re really desperate, you can use a short length of PLA or ABS filament, but it isn’t nearly as smooth.

– M2.5x3mm Set screws
(http://www.amazon.com/gp/product/B00JA08E6S)

If you don’t have these (or aren’t good with teeny parts), you can tie knots instead of using set screws. It’s a lot tougher to get the tension perfect this way, and you can’t adjust it after -you need to restring it.

Required Tools

Essentials:

– Small drill and/or Dremel
– Small Drill bits
I use a 1mm for cleaning holes, a 1.75mm for the set screws, and a 2mm for the pins.
(http://www.amazon.com/gp/product/B001RJE3X8)

– Needle Files
At least a small flat one for smoothing the inside of the hinges. I also like the round ones for getting burrs out of the tunnels.
(http://www.amazon.com/gp/product/B000NPUKYS)

– Sanding block or large metal file
Use for smoothing the sides of the middle segment, and for bigger cleanup depending on your print accuracy.
(http://www.amazon.com/gp/product/B00THXTXUE)

– Digital Micrometer
For measuring yourself for the model, checking drill bit sizes, etc.
(http://www.amazon.com/gp/product/B000GSLKIW)

– Adjustable temp soldering iron
I like these for smoothing certain areas, and may be needed to weld the bumper in place (depending on how elastic your material is. I can stretch it over with Ninjaflex, but need to cut and weld it with Sainsmart/generic elastic TPU).
(http://www.amazon.com/gp/product/B000AS28UC)

– Eyeglass screwdriver
For the little set screws, if used.
(http://www.amazon.com/gp/product/B00480FQJ8)

Other tools, as needed:

– Wire trimmers
(http://www.amazon.com/gp/product/B00FZPL6NU)
– Parallel jaw pliers
(http://www.amazon.com/gp/product/B000HYMQHE)
– Exacto knife and hobby pad