Thanks Creative,
Rather than a simple core, I think we were imagining something more like a subsurface network or schematic, perhaps like:
http://thumbs.dreamstime.com/z/spherical-circuit-13247938.jpg, or
http://thumbs.dreamstime.com/z/circuit-board-sphere-abstract-modern-background-39668734.jpg, or
http://thumbs.dreamstime.com/z/vector-circuit-board-sphere-set-eps-illustration-36976243.jpgWe want to see that there is something under the surface that we're revealing. Hope that helps.
Thanks!
~ Rick