Thanks, Wesmip1 even though its not the result I'd be hoping for.

A loss of 6% might show a profit on Betfair. The strike rate of 64% does seem somewhat low.

As there are not many selections per day I don't know if there would be any worthwhile filters for the method. But I might have a look at it, or something else based on the EST rankings as a 6% loss shows not too much inaccuracy.