That thing's not going to work too well, or for very long. While 3D printers can be constructed of light materials and be forgiving of flimsiness, CNC mills and routers cannot, and are not. Cut quality on a machine like that will be horrible. And the use of a Dremel tool as a spindle must be a joke - it wasn't designed to run continuously for hours at a stretch, which is often required for 3D milling operations.

Andrew Werby
www.computersculpture.com