I found this video interesting but probably don’t have the patience to do it. I don’t really need it or maybe I would try.3D printed fractal vise - The coolest tool you didn't know you needed - YouTube
That is an amazing tool. And, while I do believe Michael’s design is useful, I think it would be even better if it was CNC’d from metal. How this is not an actual product on the market is a mystery. It’s a little crazy to think this thing existed before fractals became a thing.
UPDATE: they are available:
Here’s 1 for engravers: https://fractalvise.com/
I do agree that in metal this design is much more effective, but Michael says that too.