Rock Sphere Machine Produces Off the Charts Satisfaction
https://hackaday.com/2026/02/13/rock-sphere-machine-produces-off-the-charts-satisfaction/

[Michigan Rocks] says he avoided making rock spheres for a long time on account of the time and cost he imagined was involved. Well, all that is in the past …read more (https://hackaday.com/2026/02/13/rock-sphere-machine-produces-off-the-charts-satisfaction/)