Step 2: Fabrication
This was my first real thing I've made with my CNC, so it took some trial and error.
I used a plugin called SketchUCam for Sketchup to generate CNC cut files. I won't go into specifics here, but you setup parameters such as material thickness, bit size, etch and then can mark cuts on a flat shape of the various pieces. The included Sketchup file has all the cut patterns in it, so if you use a different method to generate CNC files or use different thicknesses of plastic you can use those to make your own.
Using EMC2 (LinuxCNC) and my CNC machine, I used a 1/8 single flute bit (the best for plastic) to cut out all the parts: The clear ring from the 8.5mm sheet, and everything else from the 2mm white acrylic.
After cutting the various pieces, I needed to clean up the 12 U sections that I had cut
I used a sanding drum and my dremel to thin out the slotted ring (I wanted the entire assembly to be as thin as possible) and create a lap joint on the 3 arm inner ring
I also sanded down the 3 soon to be gold rings to thin them out (the thinnest acrylic I had was the 2mm, or else I could have just made a thinner piece)
After shaping and sanding, I used 600 grit sandpaper to run over all the parts to rough them for painting. Then off to the basement to paint! I used gold for the inner 3 ring set, and black for the slotted ring and 3 arm piece. The U shaped I didn't paint until after partial assembly.