Would someone please explain the relationship between height, jumping and heading? I have a 6'4" CD with 16 jumping, but 7 heading. Conversely, I have a 5'5" striker with 10 jumping, but 18 heading. It seems to me that height/jumping factor in the chances to win the ball, while heading determines what the player can do with it, right? So my CD is okay, because I don't mind so much where he heads the ball (heading) so long as he wins the header (height/jumping)?