Are there no mathematicians in the zone that could give a definitive answer to the ratio of sizes for say three different ones that would give the best space filling ?
I can do it in 2d but not 3d, simply by using coreldraw and playing with circles !
Edit
In case anyone asks, it's 1 x 10mm circle to 1x 1.5mm circle to 3 x 0.6mm circles.
Edit 2
I've just googled "spherical packing mixtures".
I think the word "mathematicians" should be changed to "mathematical genius" in the first line. (chair)
John
It's like doing jigsaw puzzles in the dark.
Enjoy today's problems, for tomorrow's may be worse.