Downwind
As the previous posts point out, swept back spreaders do interfere with how far you can let the sail out. I'm not sure whether your boat is a "B&R" rig, my '88 35 is a Bergstrom designed rig with a backstay and I don't consider it a "B&R" rig, which I associate with the backstayless designs of the mid 90s+ Hunters that have an even great swept back angle. Could be wrong, tho.In any case, I don't think the sail laying gently against the spreader is going to cause a lot of harm, but if it is pressing hard or creasing and chafing (i.e. if your boom is bouncing) you are going to tear it. Here some things you can do to maximize down wind performance and minimize chafe: 1) Tighten the boom vang. Pulls the boom down, descrease spill on the leach allowing for more sail area, and flattens the sail, allowing you to let it our a little farther. 2) Ease the outhaul and main halyard. Gives the sail a little baggier shape; yes it will cause the sail to bag a little more into the spreaders, but increases downwind power by creating more of a chute shape; 3) Don't run straight downwind but at an angle -- you'll go faster, your VMG will be better, and you'll be less susceptible to an accidental jybe 4) If your dead downwind, run the jib on the other side wing on wing.