angel,

that system HAS to work on the greyhounds....they have 10 races on the card and only 8 boxes per race....at least 1 box has to repeat at the meeting.....the problem is sorting out your bets and amounts if you go say 5 races without a repeat....the gallops are a different matter, it could be catastrophic going into the last race with say 7 tab numbers riding on the last in a 16 horse field....

cheers, noel