If I understand your question right. The answer why the zones are so big is because the spherical zones MUST encompas the entire body part. That means they actually overlap into the next body part. Because of this fact. The radious of the sphere can make or break good poseability. So sometimes you'll see a huge circle around a body part. Because in order for that to pose with as little warping to the parts connected to it. the arc of the sphere needs to be large. And since you can't have a large arc. Without also creating a large radious. You end up with a big ass circle around some body parts. Sounds complicated. But it's really not. Example: A softball has a much smaller radious than a beach ball. That's what makes it smaller. Therefore...the softballs radious is arced much more aggressively so it gets back to where it started sooner. Am I babbeling now? ;-) ScottA