:: Has anyone figured out a jib halyard tensioner system
:: that works and does not go through the hull...ie,
:: completely deck mounted? I think I saw two different
:: setups at the Nationals.

There's a lot to be said for simplicity and minimalism in boat rigging. I use the port-side cabin top winch and a horn cleat to tension my jib halyard, a system I copied from the legendary Leon Russell. Jib luff tension is easy to adjust, and the jib comes down like a ton of bricks as the spinnaker goes up. The main halyard terminates at a horn cleat on the port side of the mast a couple of feet up from the deck. Voila!--No clutches which slip and/or wear out the halyard tails, leak water into the balsa core in the deck and scrape the knees of the crew when tacking.