UPDATE:
I made the first tarp retensioner with 1.75mm Zing It
and the 1/4"OD x 1/8"ID x 1/16" thick latex rubber tubing and inner thread from 550 cord for lashing.
IMG_20140414_194935_077.jpg
It only weighs 4 grams yet goes from 10" to 18" until the Zing It stops it. I haven't measured the pounds of force yet but it seems more than adequate for tarp tie outs.
IMG_20140414_200654.jpg
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