Gimbal blocks for headphones

This is not a final version.

These blocks are designed to be used with a Grado headband and the gimbals from the following pair of cheap headphones: http://www.aliexpress.com/item/Skype-Gaming-Game-Stereo-Headphones-Headset-PC-Computer-Laptop-KANGLING-808-Black-Gaming-Headphones/32317264247.html

Here is a picture of the same headphones in case the above link breaks: http://i.imgur.com/982lQCm.jpg