I have just finished reading your Tracking book and thoroughly enjoyed it.
As far as I know, both from training with the DogSport and ANKC based fraternities, the various methods used by both to teach tracking are quite different to the approach you have taken.
The system you describe seems completely logical to me, and if implemented correctly, would be the best way to maximise the dog’s understanding of the task.
It leaves me wondering why no-one else here in Australia has not implemented this method before.
Congratulations on a thoroughly educational and easy to follow publication.
I now look forward to putting this into practice with my new puppy, now 8 weeks old.