I'm planning to build a layout
When things get easier at school I'll try to putt some time in it. Here is an overview:
I still have to plan a coal area at the bottom right module.
The top edge of the modules is 360cm long. At some places it's 40cm deep. I like to keep it as compact as possible.
I'm not sure which briefcase layout you mean but you might mean this one from Jeffrey MacHan:
I met him personally when he brought his modules to a trainshow in the Netherlands, he's a great guy
Some closeups:
These pics are from an album found
here. There are tons of pics in there!