Good info if you are thinking about a shelf layout for limited space modeling.
Locomotive Model Plans
Carton Built Models
Laser Cut Models
Designing Shelf Layouts – Comprehensive info from New Railway Modellers. Links to much more layout information.
Urban switching layout – Not exactly like a “timesaver puzzle” but also not as easy as a simple yard.
Designing Shelf Layouts For Fun – A large pdf with lots of info.
Carendt – A series of images of shelf layouts
Appealing Shelf Layout Ideas – Plans And Picture
Prototype – Images of an engine house and nearby station
The Model Room – A video showing some fantastic small shelf layouts.
Simple Small Layout – Westbrook
Urban Switching Layout – Expandable