bullitnut thanks my friend.
you raise a good point in regard to if he does eventually want to cut his hair short. That is why i made sure to blend into his existing hair (both above the crown and below) in order to smooth the bordering and extend the treated area. This should help alot. BUT if this client did eventually wish to crop his hair short, he would most likely need to stop back in to even out some areas and make a better transition.
like all my clients with longer hair, we went over the possibilities of hair length and what may need to be done in the future should he cut short. But for now he is in love with his longer hair (cant blame him!) and wont be cutting short for some time.
-Matt