Wasteboard drawings are at: http://docs.carbide3d.com/support/#shapeoko
Additional links at: Shapeoko CNC Router, Rigid, Accurate, Reliable, and Affordable esp.
and
http://community.carbide3d.com/uploads/default/original/2X/b/bdd1dbe409e87b1cefdaebca951607620f1fc10b.pdf — that last should be at 100%