Erect a 3-foot tall, wooden utility table and locate the exact center by drawing straight lines from each opposing corner to locate the center point. Measure the distance between the center point and one of the long table sides with a tape measure. Use this measurement to create two other points on the table to get a horizontal center line.
Measure 4 inches on either side of the point on the center line and make a mark at each point. Position a power drill to drill a 3/4-inch hole at the left 4-inch point so that the outer left edge of the bit aligns with the point and drill the hole. Repeat this with the right 4-inch mark so that the right edge of the bit is aligned with the mark and drill another hole.
Draw a line across the top of the two holes, parallel to the center line. Insert the blade of a jigsaw in the furthest right hole and cut along the lines between holes to cut out the 8-inch, 3/4-inch slot.
Turn the table over and position a circular saw so that the blade and guard stick through the center of the slot in the table. Place brackets against the saw and attach the brackets to the underside of the table with a screwdriver and 1/2-inch wood screws. Turn the table back upright.
Measure 1-inch points along the face of the two short sides of the table starting at the center point and working toward the long sides. Make pencil marks at each 1-inch measurement. Use a straightedge to draw lines across the table parallel to the new blade. Position a piece of 1-by-2 lumber cut to fit the exact length of the table. Set this on the table aligned with one of the lines and secure it with adjustable clamps at both ends. This becomes the guide for aligning boards for cuts.
Plug the foot-control extension cord into a wall outlet, and then plug the circular saw into the extension cord. Turn the saw on by pressing the power switch on the unit. Press the foot-control and ensure the saw activates.