Set up the router table as in photos 1 thru 4 to cut the slots for the connecting slats. Set the bit height at 3/16". Locate the fence at 3/4" away from the bit. Use a 5/16" straight flute bit- or another size close to that will do. Set up the stop blocks along the fence so that the slot begins at 1-3/4" from the top of the pieces, and is not longer than 2-3/4". Note that the stop on the left determines the location of the end of the slot on the right of the piece, and vice versa. Measure carefully to locate the stops.
Photo 1- Lower the piece onto the bit at the router table to start the cut.
Photo 2- Next push the part along between the stops.
Photo 3- Lift the part off the bit after it touches the far stop.
To cut each slot, first butt one end of the piece against one stop as in photo 1, then carefully lower the piece onto the cutter. Then push the piece along the fence as in photo 2, until it butts against the other stop. Lift the piece away from the bit as in photo 3, keeping your fingers as far from the bit as possible.
You can't cut all four legs on one setup. The stops must be moved so that they are at equal distances on opposite sides of the bit for the second setup. Cut two legs on each setup.
Photo 5- Make a pattern from the drawing and use it to trace the legs.
Trace the leg pattern onto the pieces (photo 5). Place the template on each piece so that the lines showing the slot on the template are directly over the slot itself (or close- it doesn't have to be exact). Flip the template over to trace the second set of legs. Cut the legs out on the band saw as in photo 6.