I was looking for DIY Vibratory Tumbler and I came across a link to LumenLab.
It took a while to find it since it was buried in their forum all over the place.
This looks like an easy diy machine. I wonder how you make sure the motor wires don’t fatique?
For specs, a good starting point would probably be 3000 vpm (vibrations per minute).
I also found this in youtube:
This is the original video that lead me to Luminlab.