When I started to write articles I did nto use model A as such and considered only first 4 functions as you would put them in line;

1 2 3 4 . Howevr it was very confusing as the majority of people was thinking in terms of model A. Now I also number functions as it is in a model A. But I do not necessarily analise it as model A suggests as i have got my own perception and theory in which I entrpret functions' interaction in a different way.