chinbok,

I have not got track variants to its full potential yet. I have noticed a few places produce very quick (or slow) times though and I do a slight adjustment for it but I would not say it is an accurate adjustment.

There are several ways to work out the track variantions and I am still condering the best way to do it. The options I have include:

1. Avg time of winner over a large number of races (500+ races).
2. Avg time of a consistent horse that has run across multiple tracks (this is good but hard to do ).
3. Track records for each distance.

Can I ask which one you prefer to use ? Depending on which one you use you are always going to get those slight differences which could cause different selections. In some races 0.1 secs can be a huge difference to whether a horse is rated as top selection or 5th selection.

Good Luck.