Regular magazine readers know when a' contributing editor' needs a new differential after the 4WD trip a 2WD operator is smart enough not to attempt. In firearms, it's; .22 most usefull cartridge? 30-06 most usefull cartridge? The 'survival industry' is a very small economic pie of wild gathered berries and freeze dried # 10 cans of flour. Thats why everyone is 'the worlds recognised greatest expert' sells a knife that predicts high tide through calibrated holes and, confronted with a technical question either A. tells the poser to seek the answer from their assigned spirit animal guide, or B. discretely consults the USAF survival manual hidden inside their blanket coat. <img src="/images/graemlins/grin.gif" alt="" />