Comments: - 

The result was a coffee known in Brazil as "potato water", very weak, because after it was prepared, it became transparent, looking like dirty water, and this is perhaps due to insufficient grinding, the beans needed to be ground at least once more to turn into a very fine powder, or perhaps the beans have not been roasted long enough.

This manual coffee mill that they made must be very old, it must be that culture that must pass from generations and remains until today, congratulations, big hug from Brazil

Super cool. Never seen anything like this before amazing. Your people now what there doing great team work. Love the Video give you all a 10

Present friends, amazing work, very good, great, I really like this work, always successful greetings from your friends, traditional Indonesian gold seekers

But this grinder is more artistic than real functionality as hand drip coffee requires much more precise grinding level with different beans

Beautifull process to make this machine. But the coffe in Brazil is very strong. The powder is very much fine. The result is a black drink

Congratulations for the skills of these stone workers ! The result is brilliant and contributes to make this art following a long tradition

You probably get asked this question a lot, but would this wonderful technology allow you to produce finely-ground coffee as well?--espresso grind, for example--rather than the coarse grind that you show in this video?