I own a '78 Hunter 25, fixed keel.Where my boom attaches to the mast, there is a slider that the boom moves on up and down with a locking pin. There are 3 different positions to lock the boom in. For a beginner sailor, where should this be placed. I'm aware that the higher your sail the more wind etc.Also, is the boom supposed to be perpendicular with the mast? There is a adjustment line at the end of the boom stay to adjust this level.I'm sure there are a million different configurations here, but until I become more adept at all the intricacies of fine tuning, I'm looking for a very general, middle of the road, standard setting. A setting I can use as a default while I test new things.Jeff