In my Lay Don Scott outsiders I omit any horse that finished sixth or better at it's last run.

I applied this last-start rule to the quaddies that have been run over the past few days. I also applied the filters that any leg that is a Maiden or where each horse has not have at least one career run then the quaddie is not bet.

The results based on Unitab divvies, and according to my reckoning are:

Mon
outlay of $4,830
return of $11,900

Tues
outlay of $600
return of $0

Wed
outlay of $6,216
return of $11,200

Thurs (yesterday)
outlay of $2,736
return of $3,500

Food for thought?