A made a Multi Jig Set up because i think is the best option for beginners to have everything in order all in one place
Cut your first Level plywood to 493.45 x 292.74 And score the jigs
Remove the First level and do a second one and cut it to 478.05 x 274.3 with the jigs together you must remove the first level jigs and cut only the square with the jig style desire
Glue the firs level and the second one, and add the jigs after
All ready to gooo good luck i hope you like it