Download the silo plans at http://www.modelbuildings.org/industrial-silos-models-to-make.html Here are plans for 3 industrial silo facilities that can be constructed for S scale, HO, OO, or N scale model trains. The plans include weathered effects and detailing that will stand a close-up inspection by the most critical eye. These silos don’t require painting apart from a little touch-up around the edges if you feel it’s necessary to hide glue marks or joins. The silo towers represent scale models of real life silos from 62ft to 82ft tall (depending on the model you build). Details are on the webpage.