not worth it
"I would give this one star. Great idea, but the chunks have to be fairly small to run them through the thing: it took 3 passes and I still ended up with chunks that would not reconstitute well. In addition, no way to clean it, so you need a dedicated grinder for each metal clay you use. The handle is also weirdly long, making it hard to hold and spin. Better to just use a razor blade and chop!"
