Sorry Michael, tried different combinations of field-size they come close to breakeven but not winning, and the long outs will kill it for most punters.

Tried only the ones with at least 10 points diff between the first and second, it naturaly increased the S/R but the divies got very skinny.

The best is to try it on track by track, because, it may sound strange but different tracks behave differently, after over 12 years I still can't find a reason for this.

I will set it up and run it, will take a couple of days.
In the mean time the top rated if top rated in distance as well is not a bad proposition.

Good luck