Pip-Boy 3000 Mark IV functional button

Dragonator has an awesome build for the Fallout Pipboy 3000 Mk 4 (at http://ytec3d.com/pip-boy-3000-mark-iv/).
However the button at the top isn't functional and he used a toggle switch to enable the LEDs.
I used his button and made it so there fits a 8x8mm switch inside.
This way you can use the actual button.