I think it is more a case sorting out which races not to bet on. The outback tracks like Kalgoolie, Darwin etc where a small catchment of horses have already highlighted the local favourites etc. Its a case of trying to find the bias on each track in each size of field for each distance. ie some tracks the favourites get up more than others. the favourite when<$2 win more often in small fields in sprints. I saw a site from UK that had the bias of barrier draws for the various field sizes and distances for most tracks in the UK. When you see the results of that analysis the only conclusion is that barrier does matter. They went on to say that some trainers put their horses in and then scratch if they get a bad draw.
Once we know where not to bet then use the SP and shop around for the best price.

Regards Beton