You guys are a rough crowd! He actually is not that far off on some of his assumptions. If he has grown 0.5 inches recently, chances are his growth plates could have a little life in them, especially with an Aromatase inhibitor (AI) on board throughout. HGH treatment is worth a try, might give him an inch at best if he uses it continuously for 1 year. In Pediatric patients with GHD they treat at about 0.1 IU / Kg / day. This would be a dosage of about 7-10 IU a day for this guy. He would have to do it every day for 12 months to probably see something noticeable, because even in deficient children HGH produces only a 15% increase in growth velocity, according to most of the medical studies. SO, if you are still growing a little, you can increase it somewhat. It cant hurt to try and might keep you lean and build a little muscle at the same time, and hopefully another inch growth. Hope you are rich cause it is gonna be expensive!!!!