My sensei here told me that, in tournaments here in Japan, the positions have to be established before you enter a tournament, and are submitted with the roster. For example, if I went in as Senpou on our submitted team roster, then I would go in as senpou the entire tournament. From what I read above, teams can decide what spots they will enter under--at the tournament? Or can they just change it around once the initial line-up has been sent in? Or maybe misunderstood my sensei?