Ok, this should work better.  The distance of the center of the circle from the
center of the first sphere is:

(d^2+r1^2-r2^2)/(2*d)

And the distance from the center of the second sphere is:

(d^2-r1^2+r2^2)/(2*d)

This time I double checked these so they should be correct, I guess that teaches
me to do math when I should be sleeping.  Anyway, sorry about that, I home this
helps.

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