I have trialed your system with my data.
my results showed about -2% On T/0 using tatts dividends.

If you want to give it a real pump along I would suggest the following:
1. Win% rank 1-3
2. Career starts <=10
3. All tracks in Australia

Using the above and making a SP guess this is what you get for today

Ballarat R 4 #12 0x072 Fleeting Embrace
Wyong R9 #11 5x372 Kentucky Belle
York R1 #5 5x349 Double Swirl

cheers
aussie