Keep in mind that western pleasure in the QH/stock horse world is slightly different than western pleasure with arabs and gaited breeds (morgans, etc) while their way of going is similar, the head set and carriage, including rein lenghth is different. So, if youa re looking for info on JUDGING (which is what your post sounded like) you need to be familiar with other breeds too. Gaited horses and others with a naturally higher head carriage go in a rommel rein versus a split rein and on a shorter rein with more contact. While You Tube can be your friend, you should also go to some horse shows and watch, watch, watch different classes. Watch the pinnings and talk to as many people in the industry as possible.