I'm going to try this idea.

I frame my Market.
Then close to Race Start Time, I compare the Actual Market to mine.
Any animals short in the Market are rehandicapped to see if I have undervalued their ability for today.

I then take my top 2 Overlays and key them with the Top 2 Chances.
And take the Top 2 Chances and key them with my Overlays.
Total Cost is 10 Units.

If at least 1 of my Overlays comes in, Is possible that I should score the EXACTA.

GEELONG Race 6

3 MISS SHANAE $4.2
8 BOOMA HERBIE $5.4
1 KING RYAN $6.5
5 INSTANT GABBIE $6.6
9 LIMBURG LUKE $12
6 NOT A ZAC $14
4 GOMAPILE $15
7 EXQUISITE DROP $20

The EXACTA should filled by my top 4 selections.
Early thoughts are 1,5 - 1,5,3,8
and 3,8 - 1,5

GEELONG Race 9

1 REGAL CADET $4
4 POLLY'S CHOICE $5
5 COMPLEXIFIED $8.3
2 SOUTHWOOD DODGE $8.4
3 BIG JAX SLAYER $9.6
8 CANDY THIRST $14
6 SO SAUCY $14
7 LEFTY ODOULL $16

This race is a little tricky but at least 1 position will be filled by my top 2 selections.

Early thoughts are 2,4 - 2,4,1,5 and 1 - 2