Out of interest I've looked at a neural method:

1) Default neurals except CF, TIM and DLR on zero.
2) No Maidens, all runners with a minimum of 3 starts.
3) 7 to 11 starters.
4) Bet 70% of the top runners in the resulting neural market.

I've only been able to look at the last 3 days - there's been 29 races.

Results (Unitab) for Tues 19 Feb.

Win outlay $51
Return $68.30

Quinella outlay $138
Return $225

Wed 20 Feb
Win outlay $84
Return $118.90

Quinella outlay $231
Return $435

Thurs 21 Feb
Win outlay $59
Return $85.40

Quinella outlay $165
return $234

By my reckoning the total Win outlay was $194 and the return was $272.60 and,
the quinella outlay was $534 and the return was $894. Fortunately I won a few dollars yesterday on this method. Three day's results and 29 races are far from conclusive but it might be worthwhile to pursue it.

If I get time I'll post today's selections.