Cheers for the reply. Had a play with the idea yesterday with some success. I only backed those in races where I had one or more of the top 4 IAS as lay selections. Ended the day 5 units ahead, and going back over Monday and Tuesday, there was around 30 units from those two days. Too early I guess to know if theres anything to it, and if I have just hit a lucky period, but will continue to monitor it for a couple of weeks.