Hi Shaun....
Yep this system was once marketed,about 10 years ago by Equestrian Publishing(Practical Punting Monthly) as the Blueprint System.
It showed tremendous potential at the start and punters were doing ok out of it.
It was even endorsed commercially by Bryan Martin of the the 3UZ melbourne radio network.
It collapsed after about 3 months - Equestrian Publishing even sent out apologies to people who bought their system offering a sizeable discount off further systems, which is ridiculous!
However, YOUR basic concept is good if the selection method is refined.
Good Luck.