My figures
I have an '89 H30 which I think has the same rig as yours. The Hunter manual says you should have highest tension on the uppers, less on the intermediates, and less again on the lowers. I don't agree with this. I find that if I follow this pattern, the leaward lower sags when close hauled in strong wind, and there is too much mast prebend. You can reduce mast bend by tightening the lowers, which pulls the middle of the mast back. I recommend the following tension (Loos gauge measurements): Upper shrouds: 725 lbs (Loos 37.5) intermediates: 510 lbs (Loos 23) Lower shrouds: 725 lbs (Loos 37.5) This is what works for me. Of course, you must get the top of the mast centered over the boat first (measure using mail halyard) and keep the mast dead straight from side to side. Once the shrouds are set, the forestay and backstay tensions are also set. Last season, I had too much weather helm, so this year I adjusted the forestay turnbuckle most of the way in and the backstay turnbuckles taken up just enough to put rings through the cotter pin holes. This has reduced the weather helm to a desireable amount (I've also learned the "reef early" lesson mentioned many times on this site to keep the boat "on its feet"). I hope this helps. Good luck.
