Ted; I've thought about your question and your going about it in the wrong way. The problem is that all the controls for the main and jib must work together in order for you to obtain 100% efficiency. for example, the cunningham is one of the controls for draft position. The outhaul is on eo the controls for draft belly and draft position. the boom vang is one of the controls for twist and the traveler is one of the controls for angle of attack.As a person learning to sail, you have to know how they all work. For example, if your mainsail is not properly set for the wind conditions and point ofd sail you are on, you can mess with the traveler all day and it won't improve performance. The problem with most books is the material is all over the place. For example, the index will show the traveler on pages 5,26,51, 203, 350 and 379. Maybe I can help you. i have written a book called the "Sail trim Users guide" and all the informatiom about each sail trim control is in one place. In other words, everything you need to know about the outhaul is discussed in the outhaul paragraph. Sailboatowners.com sell thasi book along with a Chart, which gives you the correct sail trim setting for all your controls for every point of sail and wind condition.Another point is that learning to sail by yourself is a tough row to hoe. and you only get to a certain point and you will not progress any further. My advise is to find a good sailing school tha thas a separate course on sail trim. That type of school is hard to find as most schools just give an overview of everything and thenwant to get you into chartering , where the money is for them.