Well as I suggested this one I guess I should take part! Nothing to show just yet although I have an idea how I'm going to do it. It will probably be made in a similar style to me old Sunset Tower map.

But just so you have an idea what to expect:

Silo 18 is a place found in the novel Wool (and the two follow-up books). It is an enormous place - essentially an underground arcology, 144 levels deep, and completely self-contained. One description says that if it was built above ground, it would be taller than the tallest building currently on earth. The only way to move between each floor is via a wide, circular staircase that runs the length of the entire silo - there are no elevators.

I won't be mapping every floor - 144 is a bit much. I'll just be making a select few to go alongside a side-view of the entire complex.