Chuck the Welding Wizard introduced me to an amazing publication, called the Encyclopedia of "Made it Myself " Ideas. (30th Anniversary Edition, published by the folks at Farm Show Magazine). It has a wealth of knowledge on farm machinery modifications and outlandish inventions, some of which will doubtless prove useful at a retreat. It is available through http://www.farmshow.com. While you are at it, I recommend that you get their collection of magazine back issues on CD-ROM--less than $40 for 30 years of back issues.
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Former Federal Reserve Chairman Al Greenspan says that he regrets "irrational exuberance"
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Another U.S. mountain lion attack