Hi again, In large fields I wouldn't go for it as the return wouldn't be greater than the outlay. 10-12max field I go by. All codes.Racing,Trots & greyhounds.Somewhere today, going by qtab there was a $800 winner on the dogs, ie $400 for half a unit and plenty of other returns today. I have a web site, if your interested , with a few racing links amoung other things. www.yesmelbourne.com.