You'll prob get a better answer from others but doesn't seem like much of an edge to me. You've discarded most of the races over 5 years only to achieve a 3.3% POT and a 12.5% SR. This would probably also mean that the POT is being propped up by some outlier winners which may be unlikely to occur again as they have over that 5 year period.

This isn't something i'd use but of interest nonetheless. Maybe someone else will find value in it?

I wish UB's tester was still up and running, theres some things of interest I wanted to check out on it. Unfortunately I don't have the databases etc that some here have.