Great post
Have been running a similar system based on Win Only selections, using shortlist no bet if 2 or more selections listed then if a selection go to race and seem how big the difference is between the top rated and the rest if theirs a big enough gap (about 5 pts) i make it a selection.

Stats to date

Total No. Bets 34
Total No. Wins 13
Total No. Lost 21
Strike Rate 38.24%
Win P&L 26.14
ROI 76.88%
Month Bets Wins S/R P&L ROI
Sep 28 12 42.86% 26.20 93.57%
Oct 6 1 16.67% -0.06 -1.00%

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