Exit the sketch and use the Extrude tool to pull the cut through the guide to a depth of 41mm providing for a small relief at the bottom for the sawblade. Dimension the slot at 1mm in width and make sure it extends across the entire body.
Create another sketch on the top surface of the legs and use the ‘Center Rectangle’ tool under the Sketch menu to draw a vertical shape with the center at the origin. We’ll add this right in the center of the guide.
The last feature to add to the miter guide is a straight slot for making 90 degree cuts.
