I would like to suggest throwing in a further Ordering Factor in the Spreadsheet.
The Order of Total Prizemoney won.
I sort of cheated in coming up with this idea.
In the last race at Sandown was a top performer using the FIELD Statistics only.
It started at HUGE Odds and finished midfield.
It was No 15 Fighting Wrights.
I found that by introducing the Stakemoney Order of Finish, then this horse was LAST Rated.
And by the way, the 1st FOUR finish in this Race were the Top 4 selections using these FIELD Statistics only in the NEW RATINGS.
And it got the QUINELLA in one.

Could somebody please run the Program as SHAUN has provided it, using the FIELD and also the FORM for the race 7 at SANDOWN today?
And post the results in finishing Order?
I will try again but can't get the FORM to paste into the program properly.