Originally Posted by zz4gta
To reduce twist, move the jib cars forward.
The sheet should point about halfway up the luff.
The leach and and foot should be about the same shape.
When you think you have the sails trimmed for a close hauled with all the telltales flying aft, bear way slightly - all three sets of tell tales should break at the same time. Then head up past close hauled, all three sets of tell tales should break evenly.
The leach line is the last adjustment, just use two fingers and gently take out any fluttering of the leach. Too much leach line tension is also bad.
Also, get the sailmaker out on the boat.
The best lessons on trim that I have ever had came from sailmakers.