Next, fold the WHOLE top triangle down.

Again, fold the top triangle down...

Fold in the top layer of each side, to meet the middle.

top view

working on the top floor/ceiling

top floor just in place with no glue - spiral stairs almost done

top floor all finished. very pretty

The light bars on top - have to leave room for those.

Parts for the top trim

Top trim and flaps

Clamping the top trim on

The flaps go on at the top of each section to hide the lights

Detail of the top trim

Looking 'up' at the top trim

Top trim