The second floor follows a similar pattern to the base.
The angle of the sides has decreased in line with the wat roofline. As a result the sides could not be used as a drawer guide so runners have been installed that also act as drawer stops to ensure the closed drawer is flush.
The 2 small tabs protruding from the rear compartment are the stops that prevent access to the rear compartment unless you know the combination. This is secret compartment #1.
The completed 2nd level (actually the 3rd level if you count the base)
Now on to the pinnacle….................
-- I can so I wood but why are my learning curves always circles