Hi Party,
You might like to try this approach & let us know what your findings are....
Seeing you have done all that work.

Betting 2 horses a race.
.Target the Radio TAB top 2 selections.
(Or any other reliable source)

.Target races 1-4 only.
These usually have a strong SR because they tend to have slightly smaller fields .

.Bet $3.00 on the shorter priced.
.Bet $2.00 on the longer priced.
This is = 60/40 split.

.Stop at each venue once a winner gets up.
Regardless of price or whether one is in profit or not.
e.g. 4 Venues targeting 4 winners at 1 winning result per venue.

.Try not to continue if one strikes an odds on winner , it usually doesn't get
much better after that.

.Dont continue if we have 4 outs in a row, over those 4 races, at that venue.

.Try & use Betfair for best prices because the TAB prices will be very ordinary when the Fav gets up.
Betfair is usually 20% better for the fav than the TABs so try & take that into account when one is dong any research using UniTAB for past results.

e.g.There was a TAB Fav in the first race today that paid $3.10
on Betfair it was $4.90

If one wishes to use a progressional. (Optional)
.Increase ones last bet by 15% until we break even again .
.Repeat bet if winner does not put us at break even .

Cheers.

__________________
Cheers.