Model Railroader 1995-06
Glossary of terms. Simple diagrams and text explaining how to create a two-cab layout.
Improved Installation of Circuitron Switch Machines
Model Railroader 1997-07
This author describes how he uses a 1 x 4 x 4 block of wood to install the Tortoise and its wiring before actually installing the block under the layout. This makes the overall process much easier. Because of the extra height under the layout, the article also describes the actuating crank necessary.