I have an overall plan I can send to you PropNut with dimensions etc. Its in Google sketch up file format.
So from this I drew the lines onto 12mm mdf sheet.
Then cut close to the line and clamped the sheet to the bench and used a router with trimming bit to run along the edge of the bench to leave a clean edge.
This is a great method for getting accurate straight lines on large pieces.
Continue around all sides with the same method.
Lay it on the second cut sheet and trim around to get two identical pieces.
Next up adding the corner rails