Some history on the drills he&#x27;s using (and others) <a href="http:&#x2F;&#x2F;www.lowtechmagazine.com&#x2F;2010&#x2F;12&#x2F;hand-powered-drilling-tools-and-machines.html" rel="nofollow">http:&#x2F;&#x2F;www.lowtechmagazine.com&#x2F;2010&#x2F;12&#x2F;hand-powered-drilling...</a>