His unit really looks too small to be very useful.
But if you were to look through some of the Mother Earth News archive articles... http://www.motherearthnews.com/article-categories.aspx ...there seems to be some very useful-looking info there (esp some of the older articles).
WARNING & DISCLAIMER:
SELECT AND USE OUTDOORS AND SURVIVAL EQUIPMENT, SUPPLIES AND TECHNIQUES AT YOUR OWN RISK. Information posted
on this forum is not reviewed for accuracy and may not be reliable, use at your own risk. Please
review the full WARNING & DISCLAIMER about information on this
site.