I hope this isn't too frowned upon, but I really don't want BJ to add any more height. I remember my own growth spurt in my Jr. year (from five-six to six-two), and a couple more inches by 18. I didn't proportion out right, which was most obvious in my wrists and ankles, which got thinner the longer they got. I envied shorter guys for escaping this bizarre phenomenon. I worked out at Gold's in my twenties and added some weight, but the wrists and lower forearms looked even more weird.
I'd just want BJ to fill in properly as is so he can get on with the business of rounding out his game skill-wise. Michael Jordan never actually hit six-seven, and as we all know, he went on to have a pretty good college career.