One further point on this system...

Bert says he is extending it to cover Greyhounds. Well unless you are getting fixed odds or betting on track, there is no possible way to make it work. The pools are so small, that there is no way you can accurately predict the starting price on any TAB runner.

The spreadsheets for some reason include quinella(column X) and trifecta (columnY)and place bets, with SP prices etc.
This is very confusing when trying to work out the win only component.