the X board was a "faster" and also fixed the sun bleed through on the eyes. it was not sound activated. the Reloader board was sound activated. it was released by Empire in conjunction with the Reloader B which was a sound activated Halo copy.
all the motors where the same.
paddles, there was the 9 volt, which was just 2. the 12 volt used a 4 paddles. you can also use a eggy 6 blade paddle.