Arduino mega r3 box v4 - Lid

I made a lid for http://www.thingiverse.com/thing:279537 , to fit an Arduino Mega (or Uno) and an ethernet shield. It has a nice light 'snap' together feel, and is tight enough to hold together by itself with its contents. But, it's hold is not too tight, so you can still take it apart easily when needed. I am actually amazed at how well it holds the case together without screws. May make an update later to add a cut out for an 1602 LCD.

Assembly:
Start with the jack end, and slip the fron