[quote=onekiwi]Quote from UK sails tuning guide,by John Holmberg 1994 prindle National Champ.
With the mast rigged on the boat,sight along the aft edge to ensure the diamond wire tension is even and mast straight.Adjust each wire as necessary to accomplish this,and then,tighten one or two turns on each side at a time, until the mast starts to pre-bend in the area of the spreaders As you look up at the mast while doing this, ensure the mast is still straight from side to side and the pre-bend should be visible- about 1/2 inch at spreaders[/quote]
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