Assembly:
The case has two parts attached using the hinge.  I used a small metal rod cut to the total length of the hinges on the back but small nails around 1mm in diameter or similar could be used and glued into place(Make sure to glue to the top OR bottom and not both).  The Updated version is also held closed by 6 flat circle magnets also glued into place 10mm diameter and 2.5mm thick.  I also placed a thin piece of foam on the bottom and a thicker piece on the top to hold the quad in place when closed

Print settings:
  Printed on a QIDI Tech X1
  Supports: No? Could be used for the hinges but didn't make a difference on my prints
  Infill: I used 10% but would recommend higher as I ran into some issues with this