Hi Chrome.

Using those selections of yours.

I would Lay bet 1 unit the lay if <=$4.50

Send off Back bet in-running for 2 units or less, to win if its in-running price drops to 2.00 or less.

If horse wins instead of falling over for us - we break even or some profit depending on price matched.

Thats better than copping a straight 3.5 unit loss if it should get up to win.
And not having a cover bet put on to offset it.

If Back bet is sent off & matched but does not end up winning.
We would lose only 1 unit. (2 Back - 1 Lay = 1)

Lay betting can be fun if betting 1 for 1
But it can become a nightmare if we are laying to odds & gets bit all the time on a bad day.

This method tries to address this.
And makes Lay betting this price range , more economical.

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Cheers.