I was discussing the minimum, not the maximum and I stand on my statement that 600 Fue is a waste of time, have you had FUE?
HairHope, I don't really want to sound negative but how did you end up having such a firm suggestion? You have no knowledge of how bald he is, his history, his age. What if this guy is in his early 20s with a SLIGHTLY receding hair line and 800 grafts should be enough to thicken it up. Or what if he is NW4-5 and even 1200 will not be enough. Not saying you are wrong, just saying there are many factors you didn't account for.