Bullocks & double Bullocks to curses.

I feel you will have some strong div days.

But I also believe you will find, its the short prices getting up all day, that will make the idea more or less break even long term.

If using TAB prices.
Betfair I feel will give a stronger edge.

If the 1st & 2nd fav could be neutralised to break even some how , it may turn it into profit.

Maybe something like ...
1.30 units on <=5.00 or top 2 selections.
1.00 unit on =>5.20 or 3-5th sels.

Cheers.

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Cheers.