This is a short video how to assemble the mobileXcopter GoPro 3 lens protection which is available at Shapeways store. GoPro 3 replacement glass and screws from the replacement kit are needed to complete the protection.
Video has brightness turned up to see the black detail better and should be replaced in folowing weeks.
Shapeways store : shapeways.com/shops/mabilexcopter
There are 4 different models, but they share same base design.