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If you haven't seen Mattias' website before, you should take some time to look at all of the other cool stuff he's built:

http://woodgears.ca/tools.html

This guy is awesome.

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I especially love his marble machines. They're absolutely mesmerizing.

His Lego domino row building machine is pretty neat too. It does its job pretty well, with only a few Lego blocks used. http://woodgears.ca/domino/index.html

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