Swoop, do you plan to use finasteride or minoxidil, since when your hair is buzzed and short, it looks that your NW6 pattern has started to miniaturize. So eventhough you are NW2 or 2.5, whole NW6 pattern slowly starts to miniaturize. YOu can clearly see difference in denisty between top of the head and sides.
I remember, one hair loss veteran once said when you first start to notice hair loss, you've already lost 40 - 50% of hair density. Most people start to recede, but in same time they start to diffusely loose hair in NW5 or NW6 area. It interesting thing.
I'm sure he still has enough hairs on the back of his head for another transplant if needed in the future.