Pinball

Ok so i was trying to recreate a simple pinball game, Which would be easy since it has in-built physics and such.

But i can seem to get the inside modeld.

http://www.upurload.com/files/d30fb379c7f6ab0a8c958da2070c64b1.jpg

any advice, ideas or tutorials that i don’t know off would be appreciated since i can’t even get the modeling done.

*If you look closely to the edges left and right they get bigger, and which mess would be best to start off for this project.

I did add a Plane, cut it in half and added a mirror modifier since it seemed obvious.

Thanks
Wentzel