The H14 likes lots of slack, should be about to grab the shroud and turn your fist 90 degrees, if you are in a lot of slop and light winds I would tighten it up a bit just to keep it from flopping around. A dog bone is used for trapeze. Your harness hooks into it. Look on page 9 for the styles of harnesses and page 10 for the styles of dog bones. Of course this is page 9 and 10 of the 2006 Hobie Parts and Accessories Catalog. http://www.hobiecat.com/sailing/accessories.html
also try to get by and see your dealer, if there's one close, or a Hobie fleet.
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Hobie Division 15 Chairman
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