Wow, he's amazing! I would suggest you train him JR, since he's close in PG/SF/PF salary, and lower in SG.
I'm less knowledgable than Mannon, but I believe you don't need anymore RB pops, for him to be a good SF. I like like his rebounding just as it is.
Also, no more passing, since it will eat cap and increase salary.
Maybe just improve his shooting to 15/14 by training outside shooting, and that's it, whopping 135 skills for a superstar potential.
I have been training a poor man's version of your player, using allstar pot, and lvl 3 coaches
He's at 107 skills, close to popping in some skills, will definitely reach 110
11/11
12/12
12/9
12/10
9/9
Originally, I though to bring him up to 106 skills, but he exceeded that, so I believe your player may get those 4-5 pops easily. Than again, maybe my player had high sublevel in pot. My only other experience in training close to capped players, is a bench warmer, he simply stopped popping at one point, regardless of training.
Also, looking at salary calc, you can safely give your player another pop in SB right now, it won't move him to PF land, but depends on what you plan to train further.