I've been messing with the + (4 way rocker switch thing) button and the o & x button on the Eleco machines and managed to change the play display, machine sounds and even found a few simple games that can be played for free on the LCD panel (guess while you are waiting for your friend next to you to finish his major payout without falling asleep ) - is this old news ? Or shall I take a few pics and explain steps to get them etc.