Hi there LetsBet, I think I bought a Roger Biggs book some years ago but cant remember the name of it. I ended up selling it on ebay. So these ratings you have created, how many races do you use them for and on which days. And how long do they take. I've spent countless hours setting up a spreadsheet of my own, based on best times where I rate every horses last start, but recently the heavy tracks are playing havoc a bit, as I only concentrate on sydney on saturdays. A few weeks ago before the rains I had some excellent results.

Paul