Kitbashing a PRR Tower
Railroad Model Craftsman 2003-08 pg. 70 Scale: O Category: "Structures - Track-side Details"
Starting with an Atlas O-scale signal tower to create this PRR tower. Fully detailed interior is visible via the removable roof.
Scratchbuild a Chesapeake & Ohio High Side Gondola
O Scale Trains Magazine 23 November 2005 pg. 4 Scale: O Category: "Freight Cars - Gondolas"
This article describes how the author built a 1953 50-ton gondola from brass, styrene, and paper (for the rivets). Includes cutting diagrams, step-by-step photos, and a parts list. There is also a sidebar on how to create the rivet lines.