"In a display of colorful creativity, a man who goes by "Tony the Pinball Wizard" [ ] lived up to his nickname by building this pinball machine using almost entirely 3D-printed parts."

"Tony put in over 200 hours in OpenSCAD, creating 181 unique items. After the design stage was finished, the actual 3D printing took 1,200 hours, approximately fifty days."

If you watch the video, the right ramp has a cool return to the left flipper.

http://www.popularmechanics.com/technology/design/a23782/3d-printed-pinball-machine/

It does look a little slow, wonder if it just needs more incline? I would guess that the objective of the project was not to make the most badass playing pin in the world, but to show that it could be done.