I'm right there with ya Jay, but I'm starting to lean to being a 50-50 problem between the guards and big men. A lot of Harrison's problems are with his confidence in being able to seal his man. It's been a while, but from what I remember he would normally have his hands low trying to feel his defender, instead of giving a target and the ball would practically hit him in the chest before he could get his hands up. Him having a long background in football, I don't think his hands are really the problem.
To get to JO, he gives a target but it's always high. I hate throwing into a post player that wants the ball up above his head. It's easier to hit someone in the chest than it is his hand, just like oversized golf drivers, there's more forgiveness if you miss just slightly.