This post features two living houses and one engine roundhouse in HO scale, build with the figures in SCARM by Howard McLay. [>>>] Living and Engine Houses in HO Scale
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This post features two living houses and one engine roundhouse in HO scale, build with the figures in SCARM by Howard McLay. [>>>] 
Read this tutorial in order to see how to create a roundhouse in your track plan in easy and proper way.