OK - moving took up way too much time. I've never had so much hassle before - sorry for the delay. Ok, the difference between a system inheritor and a grandmaster, at least for us. Here's the progression of titles: student, guro, master, grandmaster/eskrimador. A guro develops students. A master has students that have become guros. A grandmaster has guros that have become masters. Grandmaster is supposedly one who has both skill and teaching experience. More than one grandmaster is allowed since it's merely a title, recognition of what one has accomplished. A system inheritor is different. Since Decuerdas is a family-specific art (the families in the clan are Tenio, Besira and Ranario), then an inheritor to the art is expected to be family - usually eldest son/nephew who has been trained - altho there are plenty of females with training too. In this particular family, there will always be someone that is trained; these people live this stuff, it's who they are, not just what they do. So, by bloodline and by age and by training, the active clan masters are able to determine an inheritor in the event one is not appointed. Since it's possible for the inheritor to not be a master, then it becomes the duty of the other masters to provide training. The inheritor is looked upon as the family "martial partiarch", the head of the art.