I agree that the PSK is a very fine kit, but it can be tweaked to good advantage. There are always items which can be added to good advantage - water, for instance if you are in a water scarce environment. You may wish to adjust contents with the changing seasons. Your total load, not just this kit, should e appropriate for the environment you encounter.

When you eventually need to use the items in this kit, whatever the items cost will b fabulous bargain.
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Geezer in Chief