Dale, your ratings method sounds promising. I presume you are keeping accurate records and intend to persevere with it.

Today was not a bad day for the Lay system.

Nos 1 to 4.
There were 2 accidents from 11 selections for a profit of $32.53. Unfortunately I did not lay them. I'm recording the results separately to see how they fare.

No. 5 and higher.
There was one accident from 13 selections for a profit of $55.71.

Tomorrow I'm leaving the system alone because Betfair will be down.