Man it's loud haha, don't mind me, just relaxing to the sound of sand being crushed by a metal ball. Edit: might be quieter with more sand. Realize that was ju

Man it's loud haha, don't mind me, just relaxing to the sound of sand being crushed by a metal ball. Edit: might be quieter with more sand. Realize that was just a proof of concept video. Also not sure if the gears can be made to be quiet. Cool mechanical engineering, could build 3D printers and what not.