+// Width over thickness determines how wide the plastic will be when extruded
+// onto the object that is being printed. width_over_thickness is multiplied
+// by the layer_height to calculate this width. i.e. If your layer_height is
+// set to 0.3 mm and your width_over_thickness is set to 2.2, the resulting
+// width will be 0.66 mm.