This image shows the inside of the west, it is hopefully a little more of the shape you suggest. The outside of the west doesn't reflect the inside all that well because I have tried to make room for technological gadgets inside the west itself. I don't agree that the shoulders need to be wider, as keeping them the way they are gives more room for moving the arms.
In the begining God created a whole lot of rigid bodies, and set some motion paths. He also set the lighting.