I'm obviously late to the game on this one...
Which, looks to have spawned from his prior *use of* (being more than "experiments with") CD/DVD slides in a CNC mill using a rotary-tool. #CDCNC Nicely Done! Can't believe I hadn't thought of it.
Also, he explains well a phenomenon that could befuddle nearly any aspiring CNC DIYer... Did you know there's such thing as cutting too *slow*?
Check out his work!