Thorns, the price range of $10 to $50 shows according to your data a POT of 6.5% with the TAB.

In this range there is such a price discrepancy with Betfair S.P.

It's because of these high prices that my 70-80% method is continuing to perform. Currently there have been 82 winners from 93 races (737 selections/bets). I omit the Tele fave because it is unpredictable in both performance and divvies, and at this time I have no intentions in introducing it.

The profit with S.P. is $847.80 but the results with the TAB is a loss of $104.70. It is a profit of 24% compared to a loss of 14%. According to this, your 6.5% POT would be amazing.

I believe the Tele and ************** markets are identical, but I leave the latter alone as it seems to adversley affect my computer.