# Rubiks Cube Blueprints?

I am looking for the blueprints needed to make a functional 3 x 3 Rubik's Cube. I'm not so worried about the outside appearance, (It's just a cube divided into 9 square sections for each face,) but I am looking more for something that shows the inner dimensions and shapes of the Rubiks cube: the little "nub" type bits that are on the inside of each of the smaller cubes and the shape of the inside inside structure that looks like this.

Any pointers would be much appreciated