Barny, you are obviously of the belief that all filters work on all tracks and in all states, this is simply not true. Sydney and Melbourne have so many tracks that all play differently whereas Brisbane, Adelaide and Perth have only a couple of tracks making the racing much more consistent, even if the class of racing is not as strong.

The same goes for ratings and pre-post prices, some have much better success in certain states and even certain tracks so "blanketing" everything is not logical.

If you were smart you would use your database to find what works best at different tracks, states, meeting types (M,P,C) and any number of other variables. I have started betting a new group of systems that are based on strengths at certain tracks and so far my forward testing has mirrored by backtesting - today at Cranbourne was a great example with winners in races 1,2 5 (check the divs) from only 5 selections.

If you can't/won't agree with the statements I have made then you are oblivious to any kind of reasoning and I wish you all the best with your own systems. Mine do just fine and I actually bet on them as well.