Thanks, Gunnar and Dreamer. I have seen the pages you mentioned for Roland and Technics users, but they are very different in relation with yahoo PSR group. I can't see similar users exchange or share, styles of ALL keyboards converted for Roland or Technics, styles manufactured by users...

So, my questions remains in the air:
-Is more dificult to convert or to manufacture styles for those formats?
-Are Roland or Technics users more individual persons (they don't like to share so much)??
-Or perhaps, something easier: Are PSR users a lot of persons and Roland or Technics users are a few?