How the Welztalbahn developed over the last four years

I'm building the Welztalbahn layout for about 4 years now.

Spring 2008: It all started with a platform in the garage

Spring 2009: Hidden staging level and ramp to middle level are built. Also, I'm already toying with computer control.

Spring 2010: Track on the middle level is almost complete. First scenery ("the creek") is in.

Spring 2011: The main line is functional through all 3 levels. Most tracks are in. There's scenery, even some background.

Spring 2012: More scenery, signals, and a tested operating scheme.