Well that sure makes sense, but I've got some motion in the dance sequence where I'd have to move the spheres also to get the desired effect ... hmmm, which doesn't sound bad at all. Why, you may have hit upon the hardest part of animating the dancing partners. I could use the spheres as reference points for the movements, kind of a reverse method of the capture dots used in motion files.

Thanks bunches. Sounds like a winner to me.