It makes it hard to use the neurals if they keep changing. In my opinion it is best to grab them the night before and use that figure. That way your selections are always pre scratching.

I sometimes notice the figures for horses change if they have raced again within 7 days. It seems the figures take into account the future run because its in their database. for that reason I would not backtest any of the data on there and just start from tommorrow.

Its what I do.

For those who want historical data before scratchings I may be able to help out just like I help out Stix. Let me know if you need history.