Actually quite easy to Make.
First print out the 3 layers onto either sticky backed photo paper or standard photo paper if want to glue it.
Cut out and stick to approx 5mm plastic sheet, rough cut out the disc's and base layer.
Now to create perfect circular disc's the method I used was to fix an Electric Disc Sander at right angled to a Table top with clamps.
This allowed me sand down all the items to shape using both hand to work the pieces.
Then drill out the center holes and place a washer between each disc and secure with a bolt and nut. Finished.
Hope this is of use.
