J/30 Class Association Forums J/30 Forum Racing Tools and Techniques Weather Helm

Steve's advice is right on. You may want to look through the old thread Mast Set Up/Rig Tension for typical J/30 rig setup and adjustments. I can tell you that on Rhapsody, the rig tune is different for different sails that I own.

This is for one design setup, but I think you could use it as a guide then try adjusting the rig tune with your roller furling to see how the performance changes. Record the base conditions, speed, point, etc. for each adjustment, then go with what works best for the conditions.