The BEST ASMR Ever Created - YouTube . He has other videos showing how he made it.
It is interesting. I’ve seen some of his videos before, like the ones about giant lithophanes. I found 2 things most interesting about this project: [LIST=1]
he stuck with the ball bearing instead of creating a steel "torpedo" of his own design that would solve all the issues
he didn't even address the idea of "freezing" some of the designs so they could be mounted as a display. What about using flour as the medium, then spraying it with a resin fixative? I'm sure other options are available.
So what do you think of IDEX? I know this is off topic.