Seems like a pretty good hand grinder if you haven't already got one: https://www.kickstarter.com/projects/crushgrind/the-columbia-coffee-grinder
That looks intriguing.
Can't find much written about the mechanism, has anyone tried the original Brazil grinder?
Can't find much written about the mechanism
Not in a coffee grinder, but I've got T&G salt and pepper mills that have Crushgrind mechanisms. They're very good.
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Seems like a pretty good hand grinder if you haven't already got one:
https://www.kickstarter.com/projects/crushgrind/the-columbia-coffee-grinder