adjust your backstay
Dave, based on my experience with my h23 and crewing-on/watching other boats, I would say you're asking the wrong question. I do not tune the back stay when I put my mast up, but leave it just tight enought to keep the mast from falling forward. I installed a split back stay adjuster on a 3to1 fall so I can adjust it under sail to suit my point of sail and appearent wind strength. Going down wind, you will want to ease back stay tension, cunningham and outhaul to create more draft in both your main and your headsail. As you harden onto the wind, you will tension the backstay, which pulls the mast head back and, in combination with increasing cunningham tension and outhaul, flattens your sails and moves the draft forward in the sails, giving better up wind performance. In other words, there is no one right backstay tension.If you can, crew on an experinced racing skipper's boat for a few races and ask lots of questions about how the backstay, cunningham, outhaul and other sail and rigging controls shape the sail. Jim Kolstoe, h23 Kara's Boo