How does the pitch change through the phrase "a gorgeous young model"?
I can't diagram it as you did but I can describe it. The first syllable of gorgeous gets the highest pitch. So, the phrase will have a mountain shape. What happens at the end of the phrase will depend on what's coming next. If this utterance is complete in itself, the pitch will just continue descending at the end. If not, then the pitch can rise a bit at the very end, to indicate that there is more to come.