I RECEIVED AN EMAIL FROM BARRY, HE SAID TO PUT TWO TRACKS ON EACH HANDLE AND THEN I CAN RUN MY FOUR SETS WITH PROTO SOUND. I DID JUST THAT AND IT WORKS. ONLY ONE DRAW BACK, WHEN YOU HIT THE HORN BUTTON, BOTH TRAINS ON THE SAME TRACK RESPOND. BUT THAT'S OK WITH ME TONY THANKS BARRY