This is a miniature recreation of a 1934 Bally Signal Pinball Machine. It uses 14mm glass balls and comes in at about 26 inches long by 13 inches wide.
To download a zip file that includes all the 3D printed parts, DXFs for cabinet parts, construction reference photos, parts list, wiring diagram, art stencils, and exploded view of the entire machine, visit: Mini 1934 Bally Signal Pinball by legochuck - Thingiverse
While I have not created step by step instructions, everything I used to create the machine is on the Thingiverse page and should be accessible should you wish to create your own. I've also included a step file of the entire assembly so you can bring it into your CAD program of choice to assist with assembly.
I don't have any plans to create a more detailed instruction manual at this time, but please let me know if you have any questions, as I'm more than happy to try to clarify things in my files. Hope that this can be useful to you.
Video of Gameplay: Mini Bally Signal Project Demo