Below you'll find some links to LDD models that are available for download. This page still needs to be updated with pictures.
Saturn V launch tower
Launch tower for the Saturn V ideas set 21309
3 meters long double track train bridge in Brooklyn bridge style which can be seen in the huge layout 3.0 video
Grandstand which is used in the 15 Lego train crash video
Almighty train station
The one and only... 25.000 brick Lego train station
3 meters long double track train bridge which can be seen in the huge layout 2.0 video
A simple passenger bridge to change platforms
Signal building that can be seen in the coal terminal video
Pneumatic pressure reducer
If you want a particular pneumatic cilinder to open slower than the others, you can reduce the pressure in the tube leading to that cilinder a bit by squeezing the tube. That's what this little device does.
Coal hopper wagon
Hopper wagon with small linear actuator that can open a hatch in the bottom of the wagon. Used in the coal terminal video.