I had a look as well using the AAP pre-post prices and IAS Super Price, here is what I found (figures are rounded):

Flemington
Outlay - $6
Collect - $38
Bets - 1

Randwick
Outlay - $7
Collect - $23
Bets - 1

Toowoomba
Outlay - $21
Collect - $48
Bets - 2

Geelong
Outlay - $9
Collect - $20
Bets - 1

Bathurst
Outlay - $26
Collect - $40
Bets - 3

Gawler
Outlay - $25
Collect - $33
Bets - 2

Gosford
Outlay - $23
Collect - $19
Bets 3

Pinjarra
Outlay - $27
Collect - $78
Bets - 3

Total Outlay - $138
Total Collect - $299
Total Profit - $161
S/R - 50%
POT - 116%

Again it is interesting to see results from different pre-post favourites. Providing the liability is limited to a 3 bet sequence this could have some potential, well done Try Try Again.