Mate I'm a programmer and I have done something similiar - I defined my own rating/weighting system for various aspects of the form using TabOnline style data.

I have written a program that has recorded over 50k markets. I also made a theory testing part to the software so you can essentially say "pick my top rated only when X happens" and give it heaps of things like track condition, distance, numbers, etc.

The only thing I haven't done is made my rating system easy to change. That being said if you feel comfortable giving me the rating/weighting you use I could run probably code it up and run it over my data for you.