I quite like the idea, and I can appreciate the thinking behind it. Having said that, when I look at this piece, there is something that disturbs the flow of the smaller circles into the big on in the centre. It's somehow related to the growth in the gaps not being matched with the sane growth in circle diameter, and I am sorry to say, this upsets the visual balance in my eyes. I also think that from the outermost elements there should be at least another 3 (in ever smaller sizes). I realize that these would probably be difficult to turn, and therefore you'd have to us some sort of combination of drilling and milling (with a rounded head).