I have recently bought two rd-7s and the have different head shapes. The older looking one with darker paint has a very square looking head and the newer one with brighter paint has a more circular head (Much like the yonexs today). So are the older ones and newer rd-7s always different? Do they Play differently (Ive only had a chance to play with the older looking one, by the way it was awesome) P.S. when where rd-7's first released?