How many grafts on average whould make a difference for an NW 6, bordering on a 7? My hair is fine, dark - I know, not the best as far as coverage goes. I'd be satisfied with a frontal forelock design.
I was a NW 6 and had a total of 4,400. I'm only 6 weeks off of my 2nd and 7 months off of my first. I have fine, dark hair, and think that I'll be very pleased with the results.
I could have been borderline OK with the first 2,200, but am very glad I did the full 4,400. Look at my link below, along with those of others and you can get a good idea.
There's a guy at my doc's site foundhair.com who is a full NW 7 and looks pretty darn good considering.