Many thanks for the spreadhseet Shaun, much appreciated, will review with interest. How are your ratings performing currently Shaun? I'm around 60% strike rate for my top 4 ratings at present, down on last year but still profitable backing all 4 blind (on paper anyway!). Top rated single selections are showing profit backed blind also.

One way in which I find my ratings are helping me is that by applying a standard analysis approach to the form for every single race, I believe I can spot false favourites more easily and quickly than might otherwise be the case. ie: my ratings (and yours) are an amalgamation of several form factors with a bit of judgement (via form factor weightings in my case) thrown in - the same analysis approach is repeated time after time and while very often my ratings will throw up the favourite as first or second rated, and quite often they'll throw up a complete roughy, occasionally the favourite will be 3rd or 4th top and often not in my top ratings at all. This gives me a bit of confidence that if nothing else there may be value in the prices of the other rated top rated runners and I'll bet accordingly. So far this approach has proved profitable.

Thanks also to everyone else for their comments.