Here is the SCARM project file and several 3D screenshots from the process of building of Prussian T3 steam switcher in SCARM, used to demonstrate the new cylinder figures in v. 0.9.25. [>>>]
This is the N-scale layout, originally designed with SCARM by Bill Myrick a.k.a. Sarge. Dimensions: 5690mm x 2490mm (224" x 98"); Complexity: hard. [>>>]