If you don't mind the suggestion, instead of cutting so many "inside" sections, why not just cut out the sides, top, bottom and back sections,( same for the clip), and then have the parts spot welded into a more "box" like model? Even better if you use aluminum..
That way it looks good, and not so heavy.
I mean, since you're splurging on the CNC cutting, whats one more expense by welding it up?
That's what I would do. I can weld it together, but I can't get it cut..