this is not a good design in my opinion. you have a big opening on top leaking light.

When I use oculus, sometime light leaks through the nose opening, that ruins the immersive feeling (because you will see the glare of the screen, or see light when the scene is supposed to be dark).

one of the required materials is "Google Cardboard Lenses", where do I get those? If I had cardboard, I would not dissemble it. I can't peel off pepperoni from one pizza in order to make another pizza.

also, the two examples you gave for the lenses, both links seem to point to the same http://www.folovr.com/img/lens.jpg