Damian's round-house module is based on the round-house that still in use today in Proctor, Minnesota. It is the original pre '40s era version - 30 stalls and a 100 foot turn-table.
This is a module my dad started and wasn't able to finish. I am working on it for him.
His module connects to a couple 'end-caps' and a bridge to make a two loop N-Trak layout. This layout has been shown at several local RR shows. (it is a work in progress)