Since I don't get much opportunity to race against other J30s, my settings are suspect. We typically race in lighter conditions so my rig is always set about 2 notches lower on the loos gauge. Around 42.
If I were going to get serious about changing rig settings, I'd look at what the J24 fleet does. The J24 tuning guides all have various settings for different wind ranges. Check out the links at
http://www.paw.com/sail/j24/ There are 4 different guides from 4 different sailmakers. I glanced at the NorthSails version. It has shroud tensions for 5 different wind ranges. Since the J30 is just a scaled up version of the J24, we should be able technically to scale the shroud settings up. I'd probably start by assuming the J30 standard setting is for the medium-heavy range and attempt to scale up the J24 numbers for a starting point. Then try it out.
The point is that the pros are changing their rig settings based on predicted conditions on the course for that day.
