This morning I decided to look at Quinellas based on D.S's market. I applied the rules:

1) Minimum of 12 starters.
2) Box all selections under $100 in D.S.'s market.
3) A no-bet race if D.S.'s fave is odds-on.

The results using Unitab divvies are:

Qualifying races = 12.
Successful Quinellas = 10.
Outlay of $252
Return of $401
Profit of $149

I did not look at trifectas because the TAB take-out for quinellas is a few percentage points less than trifectas. However it would also have been a winning day because it struck the trifecta at W'bool R10 which paid inxs of $3,400 ($5,000 on NSW TAB).

I know one good day does not a winning method make but I'll be again looking at it tomorrow.