has anybody tried developing a system based on "orphan winners" (those horses that are the only last start winners in the race)...

i read an old article in ppm a little while ago by a lady called janice crawford, and she said an analysis of orphan winners at tab meetings for a year was conducted....it showed by just backing orphan winners at level stakes a pot of about 2% was achieved over more than 1,000 races....

it set me thinking, that with a few filters a profitable system may be achieved...

i tried - horses with the letter "c" or "td" after their name and pre-post favourites, but neither lifted the pot much...ppf's are currently showing about 7% pot after 150 races, the others haul in some nice price winners but not enough to lift the pot above about 5%...does anybody else have other ideas???