The only concern of the cg location is the static weight as a result or it being moved and if a weight hole is needed to make it legal, along with the placement of the weight hole.
If you watch the vid, at one point is shows how little the core actually moves when the cg is moved from one place to another. The weight of where the cg ends up is the most important thing because of the static weights of the ball. I usually focus on pin placement first, then cg placement. That is to make sure the ball is legal, and or if I'm wanting to add a performance increasing or decreasing weight hole.
Be good, or be good at it.