I made an EPS file for all the pieces I would need in Illustrator. I'm using 1/3" ball bearings as balls so I scaled everything around that, making this a 1:9 scale of the full size machine.
Thanks to the folks at this forum
where I got the layout for the target area.
With the file handy, I cut all the pieces out on our Epilog laser cutter. I know, I know, you don't have one of your own, but with an X-acto you can cut everything up just fine. For the holes you can maybe use a drill.
Note: I attached eps and svg files so that they can be opened and edited in Illustrator or Inkscape. Since these files are not what I consider final, I am not providing a pdf.