Step 1: Tools and Materials
Jewelers Drill Press
Philips Head Screw Driver
EyeClops 2.0 (for more info: http://www.youtube.com/watch?v=BOpJzH0XX-c)
Heat Shrink Casing
Screws and Nuts Fit to Mask Holes
Aproximately $30-$60 depending on what materials you have on hand. The fancy tools are largely optional and merely expedite the process
Step 2: Shrinking Form Factor
Realize box is almost all dead space.
Remove plastic nubs holding wires in place.
Cut apart; I used a band saw to remove plastic sections.
(just to clarify cut so the front electronics section has a clean cut line that will sit on face of mask)
Undo solder on battery pack leads to make this easier / so you do not break wires. You may also consider lengthening the wires to make the project easier.