Do you realize that all parts interchange? Just saw someone post about Hugley not signing to be a 5. When you run a offense vs man you are constantly screening and balancing the floor-no such thing as a number per player except when the offensive set begins. Vs zone you are going high low post,balancing the floor,overloading a side,etc. You never know where players will be in the movement. If you look at films,etc you will see big men shooting from the perimeter and guards down low. It is the nature of the game. In the 1920s and 30s you could number players because the game was in slow motion. Not today.