Results using 1 unit per race, and dutching multiple selections:
Eagle Farm
R1 +0.275
R2 +1.0
R3 +5.1
R4 +0.667
R5 -1.0
R6 -1.0
R7 -1.0

Canterbury
R4 +0.63
R5 -1.0
R6 -1.0
R7 -1.0

Sandown
R1 -1.0
R2 -1.0
R3 -1.0
R5 -1.0
R6 -1.0
R7 -1.0

Murray Bridge
R1 +4.5
R4 +1.176
R6 -1.0

Belmont
R3 -1.0
R4 +1.057
R5 +0.42

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...time held me green and dying, though I sang in my chains like the sea. - Dylan Thomas